Please don't use starvation as a resort to lose weight. You might want to do it for only a few days, but it can always develop into an eating disoder. If you feel the need to lose weight, please eat healthy and train instead. I don't want you or anyone to have to starve.
I’ve been bulimic for 9 years and no one has ever been able to get through to me just how much danger I’m putting my body through... but this video had me in tears thank you for the info I’m going to try and get treatment x
Well i be damn. . I knew you could only live about a month or so without any food at all, but,he went into details about it. . . i actually learned something new today. . good job internet!
You can actually live as long as you have fat. If you start the process being really fat, your ketosis phase lasts much longer. A man named Barbieri lost 276 pounds in 1966 because he didnt eat anything for 392 days.
My anorexic friends body started to eat her heart and she was rehabilitated in the er and I have no idea how she went long enough without food for that to happen, maybe do a vid on the brain science behind eating disorders so I can maybe understand what's happening to her.
Yes but keep in mind that even if you theoretically survive months without food,it won't happen in reality because your immune system will shut down after 2-3 weeks so not really,they might survive longer but not that much longer
Arantis Arantis I disagree. There are thousands, if not *millions* of people that water fast that don't have immune issues, even after a month. Like the original post said, that's there point of keeping excess fat stores on our body, so we could go a while without food. Of course the main reason most of us have excess fat stores, is because we just eat too much.
As someone in recovery from anorexia, this video was eye opening. I mean, I KNOW restricting food intake isn't heathy... But hearing about the different phases was eye opening? Anyway. This was a good reminder to me to STAY in recovery and on my meal plan (even when it sucks ass). Thanks, Hank
Coke Zs n Espresso n dark Coffee is in my blood N nothing kinda else When I have 292 cals today and it got to a reflex to atleast barp out a bit of the two half portions a day my mom allows me to eat vegan except the choc/carelessbinges Im veggie since Im 8 tho voluntarly and on this weird diet since march went from 75 to 55 kgs on height 160/162 cms I sortta fed up from this stuff - - lymes r sexy too n tea n wated
As someone who is also recovering from an eating disorder, keep up the good work! I know how hard it is, but always remember that getting healthy is worth it. You deserve life and good health! Stay strong, you're not alone. :)
As someone who has actually gone three weeks without eating I can say that you can feel you brain working differently and slower as it switches modes. However the time it takes for a body to burn up fat is certainly not as short as most think. I have found studies of people with feeding tubes removed in hospitals living for several months or even up to a year depending on body fat levels. The timeline most people think exist for the body reaching phase three is based on very old data or on developing countries where people have extremely low fat indexes to begin with. And before anyone thinks this will help with weight loss, I barely lost anything after three weeks, since the body slows down the metabolism to maximize surviveability. So unless you want to spend a couple months or more with ABSOLUTELY no food, which is really unpleasant, it's not worth it! Honestly, I'd rather go without sleep.
Hey Hank, here's a related question about starvation: Is it true that starvation is painless? I heard from two doctors that a starved body has so few nutrients, the nervous system does not have the available chemicals to transmit pain near the end.
Pepper Conchobhar Interesting dissertation... However, nothing I said related to "a certain type" of person, nor would I ever impose starvation upon anyone especially based on age or color. I merely asked a question, as Hank asks viewers to do. That question is about the unsubstantiated report I heard from two separate sources (doctors) who claim that toward the end of a starvation cycle, humans do not feel pain because their bodies lack certain chemicals that enable nerve function, and therefore cannot transmit pain. I am not advocating anything and I'm especially NOT advocating starvation whether self-imposed or otherwise. Therefore there is no need for justification and the commentary about erroneous beliefs about beating slaves or hurting babies are WAY off topic.
Pepper Conchobhar wait, so you're saying while starving and dehydrating yourself to death, you feel a horrible pain the whole way? (Sorry I'm not good at reading)
I've found that initially you can really feel it (like the first couple days) but then you kind of forget you're hungry and you don't really notice it as much. I think it's more of a mental thing at first but then eventually you get over that and it isn't as bad, but of course over time you will feel the physical pain.
This video was cool until I remembered that thousands of people die from starvation everyday, now I'm just depressed that they go through those stages even though we have such a surplus in the world.
It is a condition called Kwashiorkor. Basically your body requires protein to hold fluid in your blood vessels. Without a sufficient amount of protein, the fluid in the vessels leak out as edema, which collects in the abdomen.
1:00 this is why people think that eating only vegetables and proteins, and excluding glucose and carbs from their body is an effective form of weight loss, like the Atkins diet. STORY TIME! I was once for a brief period of time, anorexic. And curious as I was, I researched a lot about dieting and the macromolecules necessary for life (but mostly so I could avoid the ones I didn't prefer on a nutrition label). I know: t's funny. For an intelligent girl, I wasn't very smart. Obsessiveness and social disillusionment is more the explanation. I'd calculate how many calories came from fat and how many came from other macromolecules and tried to substitute to avoid as much fat as possible. This was later, though. At first, I just decided I wouldn't eat at all, having about two slices of bread a day. My body was in constant ketosis after a few days, and I lost weight rapidly. Continuing my restrictive-eating streak, my body then began to use up my own muscle protein to run, and I went from round and thin, to... just thin. I hadn't realized this until much later though. I resembled a very unnatural emaciated cousin to the human and relatives often asked me if I was sick. All of the muscle I had gained the year before during sports training was quickly depleted in my effort to be "beautiful." And the joke was on me, considering that muscle mass is need for fat burning. And because anorexia isn’t beautiful. After my recovery, I gained weight even more rapidly than I had lost it and it took about a year for my metabolism to straighten out and for my body to stop storing food in my thighs and stomach anxiously. Eventually my body fat distribution evened out and I could completely handle eating the way I did normally without blowing up. I had a wonderful body and didn’t even realize it thanks to my mental skew (which I’ve also recovered from if you’re wondering). My healthy body was shaved down to nothing, due to the three stages we’ve just learned about, and then blew up like a balloon when I began eating again. A year later, my body and mind recovered, and I don’t even consider myself the same person anymore. Yea, and a little lesson, don’t do stuff like that. Do things the natural, healthy way. Anything good requires an investment of effort first. Saving money requires investment. Getting good grades requires an investment of time and studying. And it’s always more rewarding when you do things the right way. Cool? Cool.
Yeah, I was having to think of this because the whole ketosis thing was making e want to do a crash diet. But I know that's not going to bode well for me because I can't stand being hungry.
Obviously that is not recommended not just because of muscle loss but also because of the nutrient deficiency that results from a lack of a well balanced diet. However, couldn't the muscle loss have been avoided if you started eating again after the major fat stores were depleted? Just curious
Ya, but, as I have learned since experimentating with my temptation, I just eat more, thereby undoing the "work" I just did. And by "eat more," I mean eat a bunch of Honey Combs.
Isn't 12 hours around the amount of time we go without food every night? That's why it's called "Breakfast" right? Like "break" "fast". Unless you mean 12 hours during the day
+Miku Fufu lmao me too. i started watching this and literally paused it and in a high pitched voice said "i came here because of amber" because i felt i would see it. hahah
Jared Kozar I've been like that for about a year now. I drink tea and eat at least once or twice every 3-4 days and I feel perfectly fine all the time, up and energized and ready to go. Friends think i starve myself, but I almost perfectly physically fit, I'm in shape and I'm working great at my job. I would like to understand that too.
The feelings of hunger and lack of concentration are caused by the body having to switch its main method of fueling itself and the brain - the same thing that occurs when people running a marathon hit 'the wall' (their glycogen stores have been depleted and their bodies are switching to burning fats). After a few days, generally 3-4, the body is using ketone bodies as its main fuel. As you are not having to switch between methods of fueling your body, you feel more clear-headed. The amount of energy you get from ketone bodies rises steadily from days 3-10, and after around day 10, it is at the maximum it will be. At this point, you feel normal because your body is fueling itself efficiently and has a plentiful supply of the fuel required to do so.
As always, an excellent report Hank! One important question: I was told by a doctor that starvation is (relatively) painless, since the body does not have enough chemicals to produce synaptic impulses; therefore nerves do not deliver pain signals to the brain. In your research, have you found any information about that? IS starvation truly "painless?"
Hank / SciShow producers, I believe you are mistaken at 0:47 when you say that the body breaks down glycogen to produce glucose. I'm quite certain that it is the other way around; one breaks down glucose through glycolysis to produce glycogen.
Fasting is also being used as an aid with chemotherapy because when you fast your body eats away more power hungry cells that aren't efficient at their job.
At about 3 mins it sounds like your suggesting ketosis makes you depressed, lethargic, socially withdrawn with trouble concentrating etc. I'm not sure if thats what you meant but wanted to point out to anyone considering Low Carb/LCHF dieting or intermittent fasting that this isn't how most people would characterise their experience of ketosis. Perhaps it maybe true in the short term for people who's bodies aren't used to burning fat, but once your body is used to ketosis is actually a very pleasant mental state to be in. I would say so long as you stay well hydrated it gives you plenty of energy, clarity and focus, I actually feel more clear headed when in ketosis that when I'm using glycogen. I'm not generally a Low Carber, I mix up how I eat but I do a bit of intermittent fasting and HFLC eating from time to time and now find the switch from glycogen to ketones pretty seemless and if anything get increased mental clarity when in ketosis.
+Mr Integrity I agree. I have been in ketosis throughout the last year or so and have not felt as he mentioned, rather I feel more clear-headed and awake than when I ate high carb diet. I have been able to go on a 7 day fast and felt surprisingly wonderful. It is important to mention that I didn't fast until I had lost about 60lbs on the LCHF diet first. So you've got to get healthy first.
I'm so thankful everyday that I have enough food to keep me and my family going. This really does seem like the most horrible death to have to go through. I know I don't eat as healthy as I should and I don't take as great of care of my body as I should, but at least I feed myself, and that's something.
I've watched a video of Prof. Richard Johnson where he talked about animals purposely getting fat in time for winter and food is scarce during winter. So, fat really is the body's emergency energy supply but humans do not know how to use fat properly like animals do.
Daisuke Sakurai It's not that we don't know how to use it, it's that we have a constant supply of food, so the fat is never needed. However, we don't stop producing fat despite this.
+Abdullah Aldosari There's a difference between over-weight people and morbidly obese people, of course. Yes, people confuse them. But morbidly obese find it generally painful to run because their fat keeps slabbing and hitting them, and their thighs just continuously slap each other.. lol
I was having a very hard time trusting all the different opinions on fasting but this is the only video I have absolute faith in because I know Hank knows his stuff! Thank you so much
Cuel to know but, I don't feel mentally deprived after consuming only water and oxygen for 3 days. I feel more awake if anything. Eating food makes you sleepy. From 3 days to 7 days you hardly feel a difference anymore, after that you get bored quite easily and one morning you start making breakfast without really thinking about it xD It's not hunger that get's me back to food, it's boredom lol.
michael ibrahim It's actually quite healthy to fast one day a week on which you consume nothing but water all day. You should try it. You can then work yourself up to fasting for longer, but you need to drink a good amount of water, cause your stomach does get quite acidic otherwise. It's also very good for you willpower, you get the feeling that you are not controlled by food anymore. Spending a day without eating suddenly doesn't seem like a big deal anymore.
while your logic is spotless ...dieticians or therapists might think otherwise. srsly tho its not heathy to fast for a day! and you know that very well...
MsThatsoundswrong A day is really nothing. I find it ridicules how most people in western society have such a locked mind set on having to eat every friggn day. It's not necessary. Giving your intestine time to clean itself and ridding itself of parasites once in a while should be mandatory. That's what I know very well.
Americans could live on their fat reserves for about three years without any food... Americans don't need breakfast, brunch, morning snack, lunch, after lunch meal, afternoon snack, pre-supper snack, supper, after supper snack, evening snack, before bed snack, bedtime snack, midnight snack, early morning snack, mid sleep snack, pre-breakfast meal...then starts all over again with breakfast.
I accidentally starved myself for three days after being sick. It's scary how fast the body works to try and keep itself moving. I honestly thought something terrible was happening, I was so weak and so depressed. If anyone thinks of trying to go without eating, please remember to make up for the lost food with water. Don't go doing a double wammy
I once starved myself for a week without any food because some terrible reason. When I woke up on the seventh day, I literally felt I was dying and my heart rate was extremely high and my body was cold but was still dripping sweat. I could say it's the worst experience through my life, so please don't try this!!!
Fasting for a week is not "starving oneself", a lot of people do fasts that long without experiencing any of those symptoms, unless you start with an extremely low body fat percentage to begin with..
I have twice fasted for 7 days, did more then a few 5 day fasts, also did a lot of 72 hour fasts and stuff. I only once felt lightheaded from it, and that was trying to jump into a multiple day fast after having had a shitty diet for a few months. Previous fasts I did usually involved me eating a low carb diet. So my body may have been already "accidentally" prepared for going into a fast.
Being in Ketosis can actually be really good for some people- severe epileptics. My little brother had uncontrollable epilepsy and when he was 3, they placed him on the Ketogenic Diet. He had to be very carefully monitored but he would literally eat a whole stick of butter as a meal. Something about the changes the brain goes through during ketosis can help reduce seizures. It kept my brother alive for over 18 months at which time he went off the idea in order to enter a drug trial for a new seizure medication.
The Crafty Cyborg Formerly known as Cassie C It's probably production of myelin sheaths that does that. Myelin sheaths seem to not be produced at a good rate on carby foods for some people. Whether or not that's genetic I'm not sure.
So then... how much longer would someone really fat survive? Because there is a heck of a lot of fat stored for the body to break down and eat up. That person's metabolism will REALLY slow down, but they should be good for a lot longer than a slim person.
The reason a fat person would die of starvation in the same amount of time as most normal people is more generally that even when in complete ketosis, the brain still requires 30 grams of glucose per day to function. Some of this is obtained from gluconeogenesis of glycerol, but the rest (~10 grams) has to come from protein. If I recall correctly, every gram of protein can be converted into approximately half a gram of glucose, so your body will burn 20 grams of protein per day even when it is in maximal ketosis. Once skeletal muscle stores have been depleted, death will occur, as detailed in the video, from lack of protein, normally causing a cardiac arrest.
***** Glue-co-knee-oh-jeh-nih-sis. Try saying it faster and faster until you think you've got it down. And I'm not posting this comment in an attempt to make you feel dumb. I honestly think it might be a useful trick for learning how to pronounce a word.
There was study done with a really over weight man. He was over 400 pounds. He lasted 360 days drinking only water and taking vitamins . You can look this up.
I was always taught, (even in IB biology), that your body started to convert muscle into energy before fat, which was why anorexia was a stupid way to try and lose weight--you'd lose all your muscle mass before you dented your fat stores my hs biology teacher just said muscle was easier to convert into energy. Why were so many adults in my life under that impression?
Your brain can burn mostly ketones very happily forever. It isn't some kind of emergency rations that bring decreased functions and sickness. In fact, most people find that replacing glucose with ketones as the primary brain fuel results in a calmer brain. The fact that a ketogenic diet is a standard treatment for epilepsy supports the idea that a brain on ketones is calmer. And there is new evidence that memory actually improves with a brain running on ketones. Of course for people who have never deviated from glucose as their only fuel, there is a transition time during which the body has to boot up its fat metabolizing systems and that transition can be uncomfortable. But it is just a transition to a previously unused and mothballed, but perfectly natural and effective, metabolic system.
Blake Ashley He didn't say it was emergency fuel??? He pointed out that in a normal person (who will most likely run on glucose first), the brain starts feeding on ketone bodies after it runs through most of the glucose but then went to say that triathletes and bodybuilders might be in ketosis pretty often. "It doesn't mean they're starving, just that their metabolisms work differently"
Camila Stefanie He states that the brain does not function as well on ketones, which is simply not true. In fact, there is evidence to the contrary. For example: universityhealthnews.com/daily/memory/ketogenic-diet-shows-promising-results-for-all-dementia-stages/
That is specifically for dementia. Your brain prefers to use glucose and na energy source. Here read this Silverthorn DU. Human Physiology: An intergrated approach, 7th ed. Pearson Benjamin Cummings.
As I have been in ketosis for much of the last 6 years I have to say my brain runs just fine on ketones. It does take a few weeks to fully adjust but metal and physical performance on a fat and protein fuel source is excellent. I don't have hunger crashes where I have to eat now or else . I don't get migraines due to low blood sugar and I don't have swings in mental acuity. I have fasted for up to a month with nothing but electrolytes and water with no muscle loss. I am a cyclist and find very little loss of ability except maybe my very highest gear its a little limited but my endurance is greatly improved.
"The fact that a ketogenic diet is a standard treatment for epilepsy" One specific (and rare) type of epilepsy that doesn't respond to medication, you mean.
Question for scishow: Can any/all of these things be reversed once the person starts to eat again? Does the brain return to its former level of functioning? Or is the damage/change permanent?
Appreciate the tip. Thx. But I watch these on my smart TV. add-ons are unfortunately not an option. Channel owners have the option "Do not allow advertisements to be displayed alongside my videos"
I'm following a ketosis diet for the first time ever right now and absolutely love it. I've been in ketosis for about a week and have no negative effects. On the contrary I've noticed an overall elevated mood and more energy. I haven't had starve myself at all to get into ketosis, just ate less than 50 grams of carbs a day. Ideally on ketosis your diet should be 80% fat 15% protein and 5% carb. On another note there was an experiment done in 1965 where a morbidly obese man in Scotland went over a year without food under medical supervision. He lived off his fat stores, but would've died without the supplements the doctors were giving him and being monitored medically. Fat does not give you nutrients so no one think you can live off your fat for ages. You'll die of a nutritional deficiency.
Jake Halford if someone was about to die from starvation, i would think they'd need to be liquid-fed, they can't possibly eat a whole chunky sandwich anyways, wouldn't their stomach just be too small at that point?
Jaya N.S. Hey who knows, that might be good? I've never had an eating disorder myself, but I think it's pretty well known to be a body image problem. If you think long and hard about the horrible, painful, excruciating experience that is starving to death, then maybe... okay maybe not you personally, but at least someone with an eating disorder, will have their fears of poor body image replaced with the fear of their body eating itself alive, struggling to get every last morsel it can before succumbing to the impossible exertion of its own functions. .... I probably didn't help, did I
went on a ketogenic diet for 2 months. my brain was extremly sharp and I hat nearly endless energy. although my strength has decreased by around 10%. I felt and looked healthier than ever. I stopped because ketosis can give you bad breath which it sadly did for me.
Can a morbidly obese person die from starvation if they were to go without food for long periods? Or will the body fat keep them alive until it's all gone?
+Mandy Johnson The answer is that they would die just as readily, and it would be even more dramatic, I think. The fat is a fuel for the body to burn, so it's mathematical: as long the body has energy to spare, it will keep going. On the other hand, the starvation per se isn't what's going to kill a morbidly obese person, since they can hold out longer - it isthe OTHER nutrients deprivation that they have been forgoing for so long, which will kill them in the end. It's pointless being able to "theoretically live" 3 months without food when you are mrobidly obese, when the lack of other nutrients necessary to regulate bodily functions will end up killing you before that (think potassium, and the heart, for example).
***** Yes every body is different, but that doesn't mean that your body is just going to go against the laws of thermodynamics. If you tried to starve yourself and THEN ended up eating more to compensate for your hunger, yes, that would make you gain weight. But simply starving yourself does not make you gain weight, it makes you lose weight, no matter how many "starvation mode" myths people somehow believe.
I barely ate for about 6 or 7 days due to a bad anxiety relapse at the beginning of the year and it was awful. I lost about 10 pounds, taking me from 125lbs to 115lbs since I have a naturally fast metabolism that causes me to lose weight fast. I am still workin on gaining that weight back and am currently up to nearly 120lbs. I have been eating pretty regularly since that week but I’ve been gaining slow because my metabolism once again prevents me from gaining weight which can be a blessing and a curse. I can’t imagine how some people can live day to day with little to no food, it must be terrible.
wow thanks..believe it or not, this video is motivation for my fast. im not lazy...working out just isn't for me...fasting is...I've always fasted when i wanted to loose weight but never knew the break down until now...
As someone recovered for an ED, I actually knew most of this. I do think it is important to point out that while your body can go without food, it cannot go without water.
What causes chronic low blood sugar, or hypoglycemia? It runs in my family, but I have no idea what the actual physiology behind it is, and would love to! Thanks for the magic that is Sci Show!
Well... It's weird? Like I'm doing a project and it's suddenly 4 pm, and you just say "I'll eat dinner then", but now you're tired of working, so you start procrastinating and it's 8 pm, you need to finish the goddamn project, so you continue working, it's 1 am, so you go to sleep. Next morning you are tired, and wake up late, so you hurry up get to work and don't eat breakfast. Just, time management problems I guess...
This is old but, honestly these days the main reason I started losing extreme weights because of my exams and studies and just stress one time I forgot to eat the whole day because I was studying the whole day and couldn't have time to even go cook ramen on the go, it just happens.
Oooo I can tell you this one personally!! I have complex gastrointestinal disorders including Gastroparesis, GI dysmotility etc etc... spent two months in hospital not long ago, gradually starving for a month while my nasojejunal tubes failed and then put on a PICC tube with intravenous nutrition for two weeks. Before finally going back home a few weeks later after a nasty kidney infection (just for fun! Lol). Still struggling to eat, but back on some meals and some special supplements for now.
watching this while starving to remind myself im not yet actually dying despite how it feels.. The horrible shameful things I would do for some cheetos right now..
I like your pokemon pic and also because not everyone has enough money in this world to afford food for the entire month and yet has "to much money" to be allowed foodstamps. more families go hungry then you will ever know
+kitty kat but why do you have internet? people in my country who can eat well don't have internet. number one reason is that internet phones are much more expensive
kenny ricardo I have internet because internet is free in the apartments where I live. I also have a phone and it was also free from the government. a strange world we live in isn't it? I can have free luxuries but be starving myself to sickness
I have fasted for 48 hours before and find this pretty interesting. There seem to be a number of benefits from fasting along with all of the uncomfortable side effects like a constant headache and uncontrollable thinking about food. I have heard that after a few days the hunger goes away almost entirely and the body doesn't gain back this hunger until it takes in food again. I can definitely attest to claims of feeling lighter and more alert while not eating. I have also done partial fasting, where I did not eat until after 4pm every week day for a month. Controlled fasting has a lot of positive things to reward those willing to try. It offers great perspective on what goes into your body and how you are affected. It will give you a deeper appreciation for food, especially the foods that are good for your body.
I am doing the experiment of intermittent fasting on myself to determine on my own whether fasting can help me focusing or not. I've actually read about the opposite link between fasting & depression, and I make a point of not trusting experiments done by psychologists easily.
Fatter humans will have a longer fat burning phase since they have more fat cells to burn off before they need to start burning off muscle. A study was conducted by the BBC - Why Are Thin People Not Fat Full BBC Documentary where one individual was able to live for a year with only vitamins and water but he was severely overweight.
Domino That is only true until a certain point. Individuals over 25 who are obese will begin to produce more fat cells. This was a somewhat recent discovery.
ah reminds me of freshman year of high school when i found out my gf was anorexic... i would make her eat a banana every day in front of me so i knew she was getting some nutrients... mehhh poor girls. "society has intrinsically linked a woman's value to her outward appearance and thereby undermining her status and strengthening the patriarchal hegemony" -Stephen Colbert
I had anorexia due to nausea from chronic debilitating pain and the thought of eating made me want to throw up. I ended up living on buttered toast and breakfast shakes. It still didn't stop my body from going into starvation mode and trying to eat itself, but helped keep me going until I found a doctor that actually believed the pain wasn't in my head.
For everyone saying that being in ketosis is a good thing I present to you my findings of it Whenever I don't eat for the day for whatever reason (mostly forgetting to get my groceries delivered) the following things are diminished severely Muscle strength 60%-80% reduction Reaction times (I crash in FSX more often than normal) Intelligence (I take 3-4 times longer to solve the puzzles in portal) Short term memory (Soldering the + and - wires of a battery together is not fun) Concentration is completely gone Physical stamina 50% reduction Top speed (running/cycling) around 60% reduction Fine motor controls (I get very jittery) Sex drive is completely shut down (not even porn works!!!) (Please explain how any of the above is good) Also i get severe nausea if I don't eat several times a day And that's just after a day I would hate to see what happens after a week If this is your idea of a good time then you really need to see a shrink
+mewantbrains being in ketosis is a good thing, but who ever said being in ketosis was enjoyable? it takes 3 days for your body to enter ketosis, 3 days of not eating. and you will not feel good, but that is a sign of your body healing. all symptoms are a sign of your body cleansing and healing, the deeper into a fast we get, the deeper the cleansing and healing. nobody ever said it was enjoyable to fast, maybe some but it's not necessarily true. you will experience healing crisis
***** way to ignore all of my points and just spout some useless crap which is un true and irrelevant? no im not religious at all, i am someone who has experienced fasting and experienced true healing. and many other people have. just look at some of the results people have gotten on forums like curezone. there a lot of science in this, our bodies evolved to go without food at times. just because you think ketosis is uncomfortable doesn't mean that whats happening in your body is a bad thing. giving your body a break from processing food may not be comfortable because it is now detoxing, who ever said that was fun? this is the problem, people will never understand of appreciate fasting because we are so toxic and dependant on food that if we go without it we look ill, we feel ill, and then people come to the conclusion that we ARE ill. The reality is that your actually cleaning out the crap from your poor decisions in life. and the most important step after a fast is to make GOOD decisions!
i... can't stop watching these videos
me neither!! it's 1:26 AM and i've been watching these videos for hours. i need to sleep...
I frequently binge these. It's like a...TH-cam Blackhole of Knawlege (I'm sorry, I had to).
Better than some other blackholes on TH-cam haha
+Andie Way omg it's 1:26 right now as I read ur comment :0
that's why i can't get my 8 hours of sleep! It's everything but the kitchen sink at TH-cam!!
Dalton Smith i know right? XD
I always stop eating once in awhile just to catch my breath.
omg same
hmmmmm
lol
+BinkieMcFartnuggets XD
+BinkieMcFartnuggets lol
I always watch this video when feeling like falling back into my anorexia; it makes me reconsider every time
me too. stay strong and keep your head up !!
Im going to try to fast for a few days to shed some pounds. Proubly wont do it to the fact that i like eating so much. Its almost like a hobby
Please don't use starvation as a resort to lose weight. You might want to do it for only a few days, but it can always develop into an eating disoder. If you feel the need to lose weight, please eat healthy and train instead. I don't want you or anyone to have to starve.
vitality of spirituality Dude 24-30 hrs *MAX* anything more and you'll be unable to concentrate and your hormones will go a bit crazy.
Cornerguy MC would you even lose anything in those 24-30 hours?
I’ve been bulimic for 9 years and no one has ever been able to get through to me just how much danger I’m putting my body through... but this video had me in tears thank you for the info I’m going to try and get treatment x
how's it going? you doing better now?
Well i be damn. . I knew you could only live about a month or so without any food at all, but,he went into details about it. . . i actually learned something new today. . good job internet!
Actually, good job, Hank! The Internet I know about is just a caustic mix of truth, lies and up skirt videos.
Still, I love Sci-Show!
pimpinnevaslipin World record is 392 days. o.o
You can actually live as long as you have fat. If you start the process being really fat, your ketosis phase lasts much longer. A man named Barbieri lost 276 pounds in 1966 because he didnt eat anything for 392 days.
@@bennetla10 wasn't he given vitimin supplements though? Lack of fule can kill you. But so can lack of other nutrients.
He was monitored by medical staff throughout the weight loss. Couldn't find any specific info about any supplemental nutrition he was given.
My anorexic friends body started to eat her heart and she was rehabilitated in the er and I have no idea how she went long enough without food for that to happen, maybe do a vid on the brain science behind eating disorders so I can maybe understand what's happening to her.
Eat her heart?!
Oh damn 😳
@@rileyautumn14344 yes. That’s what this video is about. After your fat stores the body breaks down your muscles for food. The heart is a muscle.
"Your brain is smart" some less than others
relative to your liver it still holds up well
Graey Daze damn, savage. Can I use that?
Exalted Naava you have my blessing, star child.
The body eats the least important cells first, *cough* Appendix
it probably wont ever do that, because if it did then bacteria would flood you body and you would die within about 3-4 days
u ruined it D:
So, if it removed the appendix you would have an infected place... (Right side of abdomen I guess)?
Lord GabeN i got my apendix removed Its usless all it does is cause pain sweet sweet pin hehehe
theres always a Tardis everywhere I go.
I've been on a SciShow marathon since around 8 am and I'm still going :^D
have u seen the one about sleep yet?
X-death yes
I wish I could watch you on the TV
Awesome
Legend has it that three years after writing this comment she's still going!!!
I HAVE A HUGE QUESTION. So will fat people live longer on starvation then normal size people?
that's the entire point of your body storing fat, to build up energy reserves for the times when you don't have enough glucose.
Yes but keep in mind that even if you theoretically survive months without food,it won't happen in reality because your immune system will shut down after 2-3 weeks so not really,they might survive longer but not that much longer
Arantis Arantis I disagree. There are thousands, if not *millions* of people that water fast that don't have immune issues, even after a month. Like the original post said, that's there point of keeping excess fat stores on our body, so we could go a while without food. Of course the main reason most of us have excess fat stores, is because we just eat too much.
fat reserves are for when food is scarce as it provides energy to keep the body functional. So yes fat mofos will live longer.
Dr Chopper then i'll live 10292910939193991931 years w/o food
As someone in recovery from anorexia, this video was eye opening. I mean, I KNOW restricting food intake isn't heathy... But hearing about the different phases was eye opening? Anyway. This was a good reminder to me to STAY in recovery and on my meal plan (even when it sucks ass). Thanks, Hank
You basically explained fasted cardio, intermittent fasting and ketogenic diet in a 4 minute video, without using any overhyped buzzwords. Nice job!
"its like 3 cans of coke
or 4 cans of coke if one of them is diet"
that made my day
I don't think I've been drinking enough Coke to keep my brain healthy.
+TomlinsTE step up to espressos trust me mate. That'll hype you up.
TomlinsTE mine is angry at me too
If you don't want to drink enough coke, try snorting it? (Supposedly) great for weight loss!
TomlinsTE same XD
Coke Zs n Espresso n dark Coffee is in my blood
N nothing kinda else
When I have 292 cals today and it got to a reflex to atleast barp out a bit of the two half portions a day my mom allows me to eat vegan except the choc/carelessbinges Im veggie since Im 8 tho voluntarly and on this weird diet since march went from 75 to 55 kgs on height 160/162 cms I sortta fed up from this stuff - - lymes r sexy too n tea n wated
As someone who is also recovering from an eating disorder, keep up the good work! I know how hard it is, but always remember that getting healthy is worth it. You deserve life and good health! Stay strong, you're not alone. :)
As someone who has actually gone three weeks without eating I can say that you can feel you brain working differently and slower as it switches modes. However the time it takes for a body to burn up fat is certainly not as short as most think. I have found studies of people with feeding tubes removed in hospitals living for several months or even up to a year depending on body fat levels. The timeline most people think exist for the body reaching phase three is based on very old data or on developing countries where people have extremely low fat indexes to begin with. And before anyone thinks this will help with weight loss, I barely lost anything after three weeks, since the body slows down the metabolism to maximize surviveability. So unless you want to spend a couple months or more with ABSOLUTELY no food, which is really unpleasant, it's not worth it! Honestly, I'd rather go without sleep.
why didnt you eat?
Complete lack of money.
Have you got money now? :/
Yes. That happened around Dec. 2013.
WezaQ I'm glad
Do a video on hormone imbalance caused by low fat no fat diets or low body fat %
I second this; would love to see more in-depth explanations of the physical effects of different diets.
Hey Hank, here's a related question about starvation:
Is it true that starvation is painless?
I heard from two doctors that a starved body has so few nutrients, the nervous system does not have the available chemicals to transmit pain near the end.
well at the end maybe, but in the beginning it must be pretty painful...
Pepper Conchobhar Interesting dissertation... However, nothing I said related to "a certain type" of person, nor would I ever impose starvation upon anyone especially based on age or color. I merely asked a question, as Hank asks viewers to do. That question is about the unsubstantiated report I heard from two separate sources (doctors) who claim that toward the end of a starvation cycle, humans do not feel pain because their bodies lack certain chemicals that enable nerve function, and therefore cannot transmit pain. I am not advocating anything and I'm especially NOT advocating starvation whether self-imposed or otherwise. Therefore there is no need for justification and the commentary about erroneous beliefs about beating slaves or hurting babies are WAY off topic.
Pepper Conchobhar wait, so you're saying while starving and dehydrating yourself to death, you feel a horrible pain the whole way? (Sorry I'm not good at reading)
I've found that initially you can really feel it (like the first couple days) but then you kind of forget you're hungry and you don't really notice it as much. I think it's more of a mental thing at first but then eventually you get over that and it isn't as bad, but of course over time you will feel the physical pain.
Y'all commenting smart things, and I'm just here like: " I ate more than my weight today"
This video was cool until I remembered that thousands of people die from starvation everyday, now I'm just depressed that they go through those stages even though we have such a surplus in the world.
What causes the "bloated belly" effect on people who are severely starving?
I think it's because your body starts retaining water
It is a condition called Kwashiorkor. Basically your body requires protein to hold fluid in your blood vessels. Without a sufficient amount of protein, the fluid in the vessels leak out as edema, which collects in the abdomen.
Jesus, how horrible.
Thanks for explaining that BeatleFloydZeppelin.
Can u guys do an episode on eating disorders?
They did one on crash course psychology a little bit ago, you might find it interesting :)
xcxsailormoonxcx Why don't you do your own.
1:00 this is why people think that eating only vegetables and proteins, and excluding glucose and carbs from their body is an effective form of weight loss, like the Atkins diet.
STORY TIME! I was once for a brief period of time, anorexic. And curious as I was, I researched a lot about dieting and the macromolecules necessary for life (but mostly so I could avoid the ones I didn't prefer on a nutrition label). I know: t's funny. For an intelligent girl, I wasn't very smart. Obsessiveness and social disillusionment is more the explanation. I'd calculate how many calories came from fat and how many came from other macromolecules and tried to substitute to avoid as much fat as possible. This was later, though. At first, I just decided I wouldn't eat at all, having about two slices of bread a day. My body was in constant ketosis after a few days, and I lost weight rapidly.
Continuing my restrictive-eating streak, my body then began to use up my own muscle protein to run, and I went from round and thin, to... just thin. I hadn't realized this until much later though. I resembled a very unnatural emaciated cousin to the human and relatives often asked me if I was sick. All of the muscle I had gained the year before during sports training was quickly depleted in my effort to be "beautiful." And the joke was on me, considering that muscle mass is need for fat burning. And because anorexia isn’t beautiful. After my recovery, I gained weight even more rapidly than I had lost it and it took about a year for my metabolism to straighten out and for my body to stop storing food in my thighs and stomach anxiously. Eventually my body fat distribution evened out and I could completely handle eating the way I did normally without blowing up. I had a wonderful body and didn’t even realize it thanks to my mental skew (which I’ve also recovered from if you’re wondering). My healthy body was shaved down to nothing, due to the three stages we’ve just learned about, and then blew up like a balloon when I began eating again. A year later, my body and mind recovered, and I don’t even consider myself the same person anymore. Yea, and a little lesson, don’t do stuff like that. Do things the natural, healthy way. Anything good requires an investment of effort first. Saving money requires investment. Getting good grades requires an investment of time and studying. And it’s always more rewarding when you do things the right way. Cool? Cool.
Yeah, I was having to think of this because the whole ketosis thing was making e want to do a crash diet. But I know that's not going to bode well for me because I can't stand being hungry.
Obviously that is not recommended not just because of muscle loss but also because of the nutrient deficiency that results from a lack of a well balanced diet. However, couldn't the muscle loss have been avoided if you started eating again after the major fat stores were depleted? Just curious
Ya, but, as I have learned since experimentating with my temptation, I just eat more, thereby undoing the "work" I just did.
And by "eat more," I mean eat a bunch of Honey Combs.
"always look on the bright side of life" - monty python
Reply to me your message was cut off
This episode is so satisfying to watch while I'm sitting here eating a huge roast with bacon all over it.
Considering I get light-headed after like, 12 hours with no food...I probably wouldn't last a month.
12 hours is way too long to go without food
i went 3 days with no food.
it would actually be healthy.
Isn't 12 hours around the amount of time we go without food every night? That's why it's called "Breakfast" right? Like "break" "fast". Unless you mean 12 hours during the day
whotf would sleep 12 fucking hours, jesus christ.. lmao
I never want to stop eating again. I love you, brain.
You are your brain.
Brain and heart is all you everything else is just accessories
Came here from Amber and Scott from "What the Pineapple" ❤️😊
All pineapples unite! Haha XD
+Miku Fufu tf? xD Wat
+Miku Fufu lmao me too. i started watching this and literally paused it and in a high pitched voice said "i came here because of amber" because i felt i would see it. hahah
+Miku Fufu me also
YAS KPOPERS!
When I go a few days without eating, I feel more energized, it's a good feeling. After a week it feels normal. Can someone explain this?
I have the same thing
Jared Kozar I've been like that for about a year now. I drink tea and eat at least once or twice every 3-4 days and I feel perfectly fine all the time, up and energized and ready to go.
Friends think i starve myself, but I almost perfectly physically fit, I'm in shape and I'm working great at my job. I would like to understand that too.
The feelings of hunger and lack of concentration are caused by the body having to switch its main method of fueling itself and the brain - the same thing that occurs when people running a marathon hit 'the wall' (their glycogen stores have been depleted and their bodies are switching to burning fats). After a few days, generally 3-4, the body is using ketone bodies as its main fuel. As you are not having to switch between methods of fueling your body, you feel more clear-headed. The amount of energy you get from ketone bodies rises steadily from days 3-10, and after around day 10, it is at the maximum it will be. At this point, you feel normal because your body is fueling itself efficiently and has a plentiful supply of the fuel required to do so.
I'm guessing anorexia or something like that
Odd.
What's your height and weight?
As always, an excellent report Hank!
One important question:
I was told by a doctor that starvation is (relatively) painless, since the body does not have enough chemicals to produce synaptic impulses; therefore nerves do not deliver pain signals to the brain.
In your research, have you found any information about that?
IS starvation truly "painless?"
For Americans: Fat burning stages can last from 0 seconds to 42 years.
what if I'm Mexican and part American?
+InfiniteKing_ 21 anywhere from 0 seconds to 21 years.
+Bob Hyland thats racist , really rasict , more like a month bro but morbidly obese i kindof agree more like 10 years
Robert S This was just meant as a joke. I sincerely apologize if I offended you, or anyone else here.
+Robert S (twoslik904) Being fat or skinny is not a race.
Sorry guys this is outdated. Now we just run out of battery and get rushed to the charger.
what nigga?
I get it lol
lol
I just snorted.
I don't even know what exactly you mean, but it's still funny. Idk why.
+gingergamergirl98 ew a ginger
Hank / SciShow producers, I believe you are mistaken at 0:47 when you say that the body breaks down glycogen to produce glucose. I'm quite certain that it is the other way around; one breaks down glucose through glycolysis to produce glycogen.
As an aspiring bodybuilder/strength trainer, I find this video to be extremely helpful and informative.
I heard that u can bite off our pinky finger like a carrot, but you brain just tells u not to.
the heck?
*stares at pinky finger* *likcks lips*
you physically can but your brain wont let you.
*looks at pinkie finger again* *licks lips again* *bites* 0.0...... "OW!!!!!"
***** what do you mean to say?
wow that's frightening... what our bodies can do to simply stay alive :O
It's just as fascinating!
I like the way you feed my brain. Even when you're speaking about stuff that I know, it feels nice putting everything into perspective. Sub!
I wonder if it's possible to somehow tag cancer cells for a similar self-cannibalism response...
Sure. The T-killer cells have this job, normally
Fasting is also being used as an aid with chemotherapy because when you fast your body eats away more power hungry cells that aren't efficient at their job.
At about 3 mins it sounds like your suggesting ketosis makes you depressed, lethargic, socially withdrawn with trouble concentrating etc. I'm not sure if thats what you meant but wanted to point out to anyone considering Low Carb/LCHF dieting or intermittent fasting that this isn't how most people would characterise their experience of ketosis. Perhaps it maybe true in the short term for people who's bodies aren't used to burning fat, but once your body is used to ketosis is actually a very pleasant mental state to be in. I would say so long as you stay well hydrated it gives you plenty of energy, clarity and focus, I actually feel more clear headed when in ketosis that when I'm using glycogen. I'm not generally a Low Carber, I mix up how I eat but I do a bit of intermittent fasting and HFLC eating from time to time and now find the switch from glycogen to ketones pretty seemless and if anything get increased mental clarity when in ketosis.
+Mr Integrity I agree. I have been in ketosis throughout the last year or so and have not felt as he mentioned, rather I feel more clear-headed and awake than when I ate high carb diet. I have been able to go on a 7 day fast and felt surprisingly wonderful. It is important to mention that I didn't fast until I had lost about 60lbs on the LCHF diet first. So you've got to get healthy first.
I also never experienced any negative effects when on a low-carb diet.
I'm so thankful everyday that I have enough food to keep me and my family going. This really does seem like the most horrible death to have to go through. I know I don't eat as healthy as I should and I don't take as great of care of my body as I should, but at least I feed myself, and that's something.
Five years later: KETO DIETS ARE ALL THE RAGE 📰
And that's a great example of why you shouldn't be completely skinny. Trust me, you don't know if you'll wake up in a deserted place.
Are you fat? Or just getting ready for the end?
Angel Rosas getting ready for the end.
Great video. He really breaks it down, in a fast, fun way
I've watched a video of Prof. Richard Johnson where he talked about animals purposely getting fat in time for winter and food is scarce during winter. So, fat really is the body's emergency energy supply but humans do not know how to use fat properly like animals do.
Daisuke Sakurai It's not that we don't know how to use it, it's that we have a constant supply of food, so the fat is never needed. However, we don't stop producing fat despite this.
+Abdullah Aldosari There's a difference between over-weight people and morbidly obese people, of course. Yes, people confuse them. But morbidly obese find it generally painful to run because their fat keeps slabbing and hitting them, and their thighs just continuously slap each other.. lol
+Som Ebody you're comment killed me
Bubble Nigguh Why? (And.. sorry my Grammar Nazi soul just has to say it, it's, your*)
+Gabriel Pulido Okay, maybe I should rephrase that. We do know, if push comes to shove. It's just that we just can't stop eating nowadays, haha.
The 4 can's of coke line just cracked me up XD
I was having a very hard time trusting all the different opinions on fasting but this is the only video I have absolute faith in because I know Hank knows his stuff! Thank you so much
Cuel to know but, I don't feel mentally deprived after consuming only water and oxygen for 3 days. I feel more awake if anything. Eating food makes you sleepy. From 3 days to 7 days you hardly feel a difference anymore, after that you get bored quite easily and one morning you start making breakfast without really thinking about it xD
It's not hunger that get's me back to food, it's boredom lol.
same i can go days w/out eating but then i get super bored
You guys are idiots.
michael ibrahim
It's actually quite healthy to fast one day a week on which you consume nothing but water all day. You should try it. You can then work yourself up to fasting for longer, but you need to drink a good amount of water, cause your stomach does get quite acidic otherwise. It's also very good for you willpower, you get the feeling that you are not controlled by food anymore. Spending a day without eating suddenly doesn't seem like a big deal anymore.
while your logic is spotless ...dieticians or therapists might think otherwise. srsly tho its not heathy to fast for a day! and you know that very well...
MsThatsoundswrong
A day is really nothing. I find it ridicules how most people in western society have such a locked mind set on having to eat every friggn day. It's not necessary. Giving your intestine time to clean itself and ridding itself of parasites once in a while should be mandatory. That's what I know very well.
Americans could live on their fat reserves for about three years without any food...
Americans don't need breakfast, brunch, morning snack, lunch, after lunch meal, afternoon snack, pre-supper snack, supper, after supper snack, evening snack, before bed snack, bedtime snack, midnight snack, early morning snack, mid sleep snack, pre-breakfast meal...then starts all over again with breakfast.
LMFAO you deserve an award.
that's really rude.
its really true tho
Im an American and we dont all wat that way. Stereotyping is wong.
MASTERmw100 *eat
I accidentally starved myself for three days after being sick. It's scary how fast the body works to try and keep itself moving. I honestly thought something terrible was happening, I was so weak and so depressed. If anyone thinks of trying to go without eating, please remember to make up for the lost food with water. Don't go doing a double wammy
no food, bad mood
I once starved myself for a week without any food because some terrible reason. When I woke up on the seventh day, I literally felt I was dying and my heart rate was extremely high and my body was cold but was still dripping sweat. I could say it's the worst experience through my life, so please don't try this!!!
Poor one... Here, a cookie. 🍪
Fasting for a week is not "starving oneself", a lot of people do fasts that long without experiencing any of those symptoms, unless you start with an extremely low body fat percentage to begin with..
I have twice fasted for 7 days, did more then a few 5 day fasts, also did a lot of 72 hour fasts and stuff. I only once felt lightheaded from it, and that was trying to jump into a multiple day fast after having had a shitty diet for a few months. Previous fasts I did usually involved me eating a low carb diet. So my body may have been already "accidentally" prepared for going into a fast.
Being in Ketosis can actually be really good for some people- severe epileptics. My little brother had uncontrollable epilepsy and when he was 3, they placed him on the Ketogenic Diet. He had to be very carefully monitored but he would literally eat a whole stick of butter as a meal. Something about the changes the brain goes through during ketosis can help reduce seizures. It kept my brother alive for over 18 months at which time he went off the idea in order to enter a drug trial for a new seizure medication.
The Crafty Cyborg Formerly known as Cassie C
It's probably production of myelin sheaths that does that. Myelin sheaths seem to not be produced at a good rate on carby foods for some people. Whether or not that's genetic I'm not sure.
So then... how much longer would someone really fat survive? Because there is a heck of a lot of fat stored for the body to break down and eat up. That person's metabolism will REALLY slow down, but they should be good for a lot longer than a slim person.
***** how does THAT work...
Spartan111 could be lack of other vital vitamins and minerals,not just energy
The reason a fat person would die of starvation in the same amount of time as most normal people is more generally that even when in complete ketosis, the brain still requires 30 grams of glucose per day to function. Some of this is obtained from gluconeogenesis of glycerol, but the rest (~10 grams) has to come from protein. If I recall correctly, every gram of protein can be converted into approximately half a gram of glucose, so your body will burn 20 grams of protein per day even when it is in maximal ketosis. Once skeletal muscle stores have been depleted, death will occur, as detailed in the video, from lack of protein, normally causing a cardiac arrest.
*****
Glue-co-knee-oh-jeh-nih-sis. Try saying it faster and faster until you think you've got it down.
And I'm not posting this comment in an attempt to make you feel dumb. I honestly think it might be a useful trick for learning how to pronounce a word.
There was study done with a really over weight man. He was over 400 pounds. He lasted 360 days drinking only water and taking vitamins . You can look this up.
I was always taught, (even in IB biology), that your body started to convert muscle into energy before fat, which was why anorexia was a stupid way to try and lose weight--you'd lose all your muscle mass before you dented your fat stores my hs biology teacher just said muscle was easier to convert into energy. Why were so many adults in my life under that impression?
They were wrong. Pretty sure the brain isn't dumb enough to eat the important things first like the muscles then to eat the useless fat.
We do need to appreciate the food we have and do what we can for those who don't. Good Scishow, Hank.
Your brain can burn mostly ketones very happily forever. It isn't some kind of emergency rations that bring decreased functions and sickness. In fact, most people find that replacing glucose with ketones as the primary brain fuel results in a calmer brain. The fact that a ketogenic diet is a standard treatment for epilepsy supports the idea that a brain on ketones is calmer. And there is new evidence that memory actually improves with a brain running on ketones. Of course for people who have never deviated from glucose as their only fuel, there is a transition time during which the body has to boot up its fat metabolizing systems and that transition can be uncomfortable. But it is just a transition to a previously unused and mothballed, but perfectly natural and effective, metabolic system.
Blake Ashley He didn't say it was emergency fuel??? He pointed out that in a normal person (who will most likely run on glucose first), the brain starts feeding on ketone bodies after it runs through most of the glucose but then went to say that triathletes and bodybuilders might be in ketosis pretty often. "It doesn't mean they're starving, just that their metabolisms work differently"
Camila Stefanie
He states that the brain does not function as well on ketones, which is simply not true. In fact, there is evidence to the contrary.
For example: universityhealthnews.com/daily/memory/ketogenic-diet-shows-promising-results-for-all-dementia-stages/
That is specifically for dementia. Your brain prefers to use glucose and na energy source.
Here read this Silverthorn DU. Human Physiology: An intergrated approach, 7th ed. Pearson Benjamin Cummings.
As I have been in ketosis for much of the last 6 years I have to say my brain runs just fine on ketones. It does take a few weeks to fully adjust but metal and physical performance on a fat and protein fuel source is excellent. I don't have hunger crashes where I have to eat now or else . I don't get migraines due to low blood sugar and I don't have swings in mental acuity. I have fasted for up to a month with nothing but electrolytes and water with no muscle loss. I am a cyclist and find very little loss of ability except maybe my very highest gear its a little limited but my endurance is greatly improved.
"The fact that a ketogenic diet is a standard treatment for epilepsy"
One specific (and rare) type of epilepsy that doesn't respond to medication, you mean.
Question for scishow: Can any/all of these things be reversed once the person starts to eat again? Does the brain return to its former level of functioning? Or is the damage/change permanent?
7 years later. No its not permanent, it's not really that big of a change. Only difference is the ratio of enzymes in the brain.
Appreciate the tip. Thx.
But I watch these on my smart TV. add-ons are unfortunately not an option. Channel owners have the option "Do not allow advertisements to be displayed alongside my videos"
Okay so since children would die from starvation earlier than an adult - would an overweight child survive longer than a normal weighted adult?
OKAY take this question to the deep web, they have it tested I gurantee
... That's a fun thing watch after not eating for 3 days...
I'm following a ketosis diet for the first time ever right now and absolutely love it. I've been in ketosis for about a week and have no negative effects. On the contrary I've noticed an overall elevated mood and more energy. I haven't had starve myself at all to get into ketosis, just ate less than 50 grams of carbs a day. Ideally on ketosis your diet should be 80% fat 15% protein and 5% carb.
On another note there was an experiment done in 1965 where a morbidly obese man in Scotland went over a year without food under medical supervision. He lived off his fat stores, but would've died without the supplements the doctors were giving him and being monitored medically. Fat does not give you nutrients so no one think you can live off your fat for ages. You'll die of a nutritional deficiency.
But what if someone offered you a sandwich just as you were about to die? And what if they took it away again?
Then nobody would blame you for resorting to cannibalism.
Lmao icy
You automatically turn into Gavin Free. At that point you just tell yourself not to die.
Jake Halford if someone was about to die from starvation, i would think they'd need to be liquid-fed, they can't possibly eat a whole chunky sandwich anyways, wouldn't their stomach just be too small at that point?
Mediation will keep you alive
Warning: This video might make you fat
Or be triggering for those of us in the eating-disordered community, including me.
YOU GOT TRIGGRRED BY SCIENTIFIC FACTS I'm done
But like honestly u clicked on a video called 'what happens when you stop eating'. Wtf did u expect
Jaya N.S. Hey who knows, that might be good? I've never had an eating disorder myself, but I think it's pretty well known to be a body image problem. If you think long and hard about the horrible, painful, excruciating experience that is starving to death, then maybe... okay maybe not you personally, but at least someone with an eating disorder, will have their fears of poor body image replaced with the fear of their body eating itself alive, struggling to get every last morsel it can before succumbing to the impossible exertion of its own functions.
.... I probably didn't help, did I
went on a ketogenic diet for 2 months. my brain was extremly sharp and I hat nearly endless energy. although my strength has decreased by around 10%. I felt and looked healthier than ever. I stopped because ketosis can give you bad breath which it sadly did for me.
You should do a video about how to lose weight and fat healthy with the power of sicence
It's simple. Look up how to calculate your BMI. Look up your average calorie's expended at that BMI. Consume less calories than you expend.
Why does always talk like at any moment he could sneeze.
Always good to learn something new, especially when it comcerns the body. Thanks, SciShow!
eating a cheese burger throughout this whole video... :D!
Can a morbidly obese person die from starvation if they were to go without food for long periods? Or will the body fat keep them alive until it's all gone?
+Mandy Johnson You should not do this
+Mandy Johnson The answer is that they would die just as readily, and it would be even more dramatic, I think. The fat is a fuel for the body to burn, so it's mathematical: as long the body has energy to spare, it will keep going. On the other hand, the starvation per se isn't what's going to kill a morbidly obese person, since they can hold out longer - it isthe OTHER nutrients deprivation that they have been forgoing for so long, which will kill them in the end. It's pointless being able to "theoretically live" 3 months without food when you are mrobidly obese, when the lack of other nutrients necessary to regulate bodily functions will end up killing you before that (think potassium, and the heart, for example).
Also, even if that person survives his obesity could get worse, because the body "learned" to eat more in case it's happends again.
+ShallShaLilcookies this isn't true lol
***** Yes every body is different, but that doesn't mean that your body is just going to go against the laws of thermodynamics. If you tried to starve yourself and THEN ended up eating more to compensate for your hunger, yes, that would make you gain weight. But simply starving yourself does not make you gain weight, it makes you lose weight, no matter how many "starvation mode" myths people somehow believe.
I barely ate for about 6 or 7 days due to a bad anxiety relapse at the beginning of the year and it was awful. I lost about 10 pounds, taking me from 125lbs to 115lbs since I have a naturally fast metabolism that causes me to lose weight fast. I am still workin on gaining that weight back and am currently up to nearly 120lbs. I have been eating pretty regularly since that week but I’ve been gaining slow because my metabolism once again prevents me from gaining weight which can be a blessing and a curse. I can’t imagine how some people can live day to day with little to no food, it must be terrible.
Watching this then remembering that its almost dinner and I haven't eaten lunch or breakfast oops
Short answer: you get hungry.
wow thanks..believe it or not, this video is motivation for my fast. im not lazy...working out just isn't for me...fasting is...I've always fasted when i wanted to loose weight but never knew the break down until now...
i understood nothing.
That should be troubling.
***** it was a joke. :) i understood the basic stuff thank you. :/
***** how would she know that she didn't understand it unless she watched it
Best way to start to learn anything
either you are in stage 3 of starving, or just haven`t drunk enogh cola for today
Freelee the banana girl should see this!!
As someone recovered for an ED, I actually knew most of this. I do think it is important to point out that while your body can go without food, it cannot go without water.
Thank you for this. You got through to my 8 year old. Now he is eating breakfast. :-D
whether you're fat or skinny the heart is always the first to give out.
What causes chronic low blood sugar, or hypoglycemia? It runs in my family, but I have no idea what the actual physiology behind it is, and would love to! Thanks for the magic that is Sci Show!
I'm eating pizza while watch this. Can't relate to anything in this video. :P
When people say "I forgot to eat." HOW DO YOU FORGET TO EAT!
You just do
Well... It's weird? Like I'm doing a project and it's suddenly 4 pm, and you just say "I'll eat dinner then", but now you're tired of working, so you start procrastinating and it's 8 pm, you need to finish the goddamn project, so you continue working, it's 1 am, so you go to sleep. Next morning you are tired, and wake up late, so you hurry up get to work and don't eat breakfast.
Just, time management problems I guess...
It happens.
Awesome Milkshake well like me i wake up for school might skip lunch come home and hang out with friends then sleep... and just forgot to eat
This is old but, honestly these days the main reason I started losing extreme weights because of my exams and studies and just stress one time I forgot to eat the whole day because I was studying the whole day and couldn't have time to even go cook ramen on the go, it just happens.
Oooo I can tell you this one personally!! I have complex gastrointestinal disorders including Gastroparesis, GI dysmotility etc etc... spent two months in hospital not long ago, gradually starving for a month while my nasojejunal tubes failed and then put on a PICC tube with intravenous nutrition for two weeks. Before finally going back home a few weeks later after a nasty kidney infection (just for fun! Lol).
Still struggling to eat, but back on some meals and some special supplements for now.
Diabeetus
watching this while starving to remind myself im not yet actually dying despite how it feels.. The horrible shameful things I would do for some cheetos right now..
Why are you starving? ;_;
I like your pokemon pic and also because not everyone has enough money in this world to afford food for the entire month and yet has "to much money" to be allowed foodstamps. more families go hungry then you will ever know
kitty kat Thank you! I drew it myself. And yeah, I understand ya. Fortunately my family was given food stamps, though.
+kitty kat but why do you have internet? people in my country who can eat well don't have internet. number one reason is that internet phones are much more expensive
kenny ricardo I have internet because internet is free in the apartments where I live. I also have a phone and it was also free from the government. a strange world we live in isn't it? I can have free luxuries but be starving myself to sickness
I have fasted for 48 hours before and find this pretty interesting. There seem to be a number of benefits from fasting along with all of the uncomfortable side effects like a constant headache and uncontrollable thinking about food. I have heard that after a few days the hunger goes away almost entirely and the body doesn't gain back this hunger until it takes in food again.
I can definitely attest to claims of feeling lighter and more alert while not eating. I have also done partial fasting, where I did not eat until after 4pm every week day for a month.
Controlled fasting has a lot of positive things to reward those willing to try. It offers great perspective on what goes into your body and how you are affected. It will give you a deeper appreciation for food, especially the foods that are good for your body.
1:32 Organs are _way_ out of place there!
I feel guilty cause I watched this while eating
Don't be, you'd be more guilty when your brain is hungry.
makes me feel so better for starting myself knowing it'll work in the long run.
I watched this while eating mac and cheese
I'm quite attracted to Hank..
I am doing the experiment of intermittent fasting on myself to determine on my own whether fasting can help me focusing or not. I've actually read about the opposite link between fasting & depression, and I make a point of not trusting experiments done by psychologists easily.
Fatter humans will have a longer fat burning phase since they have more fat cells to burn off before they need to start burning off muscle. A study was conducted by the BBC - Why Are Thin People Not Fat Full BBC Documentary where one individual was able to live for a year with only vitamins and water but he was severely overweight.
JESUS!
Actually, fat people don't have more fat cells, just larger ones. The number of fat cells don't change. They just shrink or expand depending on usage.
Domino That is only true until a certain point. Individuals over 25 who are obese will begin to produce more fat cells. This was a somewhat recent discovery.
svenypoodles Oh dear, I guess this means my weight loss efforts will be harder than I thought. Oh boy . . . >_
3:09 Which is why anorexia is a viscous cycle.
I didn't know you got your own channel and I'm really happy you're still on YT. Thought you stopped.
lol i was eating during this video C:
ah reminds me of freshman year of high school when i found out my gf was anorexic... i would make her eat a banana every day in front of me so i knew she was getting some nutrients... mehhh poor girls.
"society has intrinsically linked a woman's value to her outward appearance and thereby undermining her status and strengthening the patriarchal hegemony"
-Stephen Colbert
ah, yep. this is the comment the fatties were looking for.
How is she doing now, when being THICC's the new skinny.
I had anorexia due to nausea from chronic debilitating pain and the thought of eating made me want to throw up. I ended up living on buttered toast and breakfast shakes. It still didn't stop my body from going into starvation mode and trying to eat itself, but helped keep me going until I found a doctor that actually believed the pain wasn't in my head.
Can he talk any faster?
***** i was wondering the same thing. it was hard to catch up
Wow you must be really stupid. He wasn't even talking that fast you should see my college teacher he speaks double as fast as he does
Awesomethunder16 Is that stupid comment for me or BeautyGyaan ?
Awesomethunder16 "You must be really stupid" "My college teacher speaks DOUBLE AS FAST as he does"
***** OH SHIT REALLY HOLY FUCKING SHIT WOOOOOOOOOOOOOOOOOOOOOO IM GONNA SAVE SO MUCH FUCKING MONEY WOOOOOOHOOOOOOOO
For everyone saying that being in ketosis is a good thing I present to you my findings of it
Whenever I don't eat for the day for whatever reason (mostly forgetting to get my groceries delivered) the following things are diminished severely
Muscle strength 60%-80% reduction
Reaction times (I crash in FSX more often than normal)
Intelligence (I take 3-4 times longer to solve the puzzles in portal)
Short term memory (Soldering the + and - wires of a battery together is not fun)
Concentration is completely gone
Physical stamina 50% reduction
Top speed (running/cycling) around 60% reduction
Fine motor controls (I get very jittery)
Sex drive is completely shut down (not even porn works!!!)
(Please explain how any of the above is good)
Also i get severe nausea if I don't eat several times a day
And that's just after a day
I would hate to see what happens after a week
If this is your idea of a good time then you really need to see a shrink
Rip portal speed run.
Until I eat or drink something loaded with sugar
Then I can do a portal speed run lol
+mewantbrains being in ketosis is a good thing, but who ever said being in ketosis was enjoyable?
it takes 3 days for your body to enter ketosis, 3 days of not eating.
and you will not feel good, but that is a sign of your body healing.
all symptoms are a sign of your body cleansing and healing, the deeper into a fast we get, the deeper the cleansing and healing. nobody ever said it was enjoyable to fast, maybe some but it's not necessarily true.
you will experience healing crisis
You sound like one of those insane Muslims that says I will go to hell if I eat everyday
***** way to ignore all of my points and just spout some useless crap which is un true and irrelevant?
no im not religious at all, i am someone who has experienced fasting and experienced true healing. and many other people have. just look at some of the results people have gotten on forums like curezone. there a lot of science in this, our bodies evolved to go without food at times.
just because you think ketosis is uncomfortable doesn't mean that whats happening in your body is a bad thing.
giving your body a break from processing food may not be comfortable because it is now detoxing, who ever said that was fun?
this is the problem, people will never understand of appreciate fasting because we are so toxic and dependant on food that if we go without it we look ill, we feel ill, and then people come to the conclusion that we ARE ill.
The reality is that your actually cleaning out the crap from your poor decisions in life. and the most important step after a fast is to make GOOD decisions!
I been fasting for a while and I feel amazing I don't feel depressed if anything the fasting has reversed my depression
your so fast explaining