Alternate-Day Intermittent Fasting Put to the Test

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  • เผยแพร่เมื่อ 30 ก.ย. 2024
  • Does every-other-day-eating prevent the metabolic slowing that accompanies weight loss or improve compliance over constant day-to-day calorie restriction? Intermittent fasting is put to the test.
    New subscribers to our e-newsletter always receive a free gift. Get yours here: nutritionfacts...
    Whoa that was a long one, packed in a lot of good stuff. So, bottom-line: it doesn’t appear to provide an edge over traditional calorie cutting, but if you like it better, why not give it try? Maybe you should hear my next video first, Is Alternate-Day Intermittent Fasting Safe? (nutritionfacts.....
    Over the next couple weeks, we round out the series with:
    • Does Intermittent Fasting Increase Human Life Expectancy? (nutritionfacts....)
    • The 5:2 Diet and the Fasting-Mimicking Diet Put to the Test (nutritionfacts....)
    • Time-Restricted Eating Put to the Test (nutritionfacts...)
    • The Benefits of Early Time-Restricted Eating (nutritionfacts....)
    What about total fasting? If you missed them:
    • Benefits of Fasting for Weight Loss Put to the Test (nutritionfacts....)
    • Is Fasting Beneficial for Weight Loss? (nutritionfacts....)
    • Is Fasting for Weight Loss Safe? (nutritionfacts....)
    I have a whole chapter on intermittent fasting in my new book How Not to Diet-pre-order now (nutritionfacts....! (All proceeds I receive from my books are donated to charity.)
    Have a question about this video? Leave it in the comment section at nutritionfacts.... and someone on the NutritionFacts.org team will try to answer it.
    Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at nutritionfacts..... You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics.
    If you’d rather watch these videos on TH-cam, subscribe to my TH-cam Channel here: www.youtube.co...
    Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
    -Michael Greger, MD FACLM
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ความคิดเห็น • 250

  • @NutritionFactsOrg
    @NutritionFactsOrg  4 ปีที่แล้ว +88

    I have a whole chapter on intermittent fasting in my new book How Not to Diet-pre-order now: nutritionfacts.org/how-not-to-diet/ (All proceeds I receive from my books are donated to charity.)

    • @raaedmj80
      @raaedmj80 4 ปีที่แล้ว +1

      Fasting in islam does not start from sunrise, in fact it begins from dawn.

    • @bookmouse2719
      @bookmouse2719 4 ปีที่แล้ว +2

      @@raaedmj80 That must be hard

    • @Battery-kf4vu
      @Battery-kf4vu 4 ปีที่แล้ว +4

      Please talk about autophagy, Doc.

    • @lindamcneil711
      @lindamcneil711 4 ปีที่แล้ว +2

      Glad to see you embracing this... I have been studying it for about a year now. If you are fat adapted, there is no ravenous hunger. There are some good studies out there.

    • @brankobakic9744
      @brankobakic9744 4 ปีที่แล้ว

      Dr Greger i would like to hear your thoughts on on daily 16/8 if Aka leangains which includes a predetermined amount of calories with s balanced macro nutrient profile!

  • @copisetic1104
    @copisetic1104 4 ปีที่แล้ว +73

    I switched to good fats and protein and vegetables, dumped sugar and refined carbs. I fast 18hr everyday, sometimes 24-48 hr fasts. I don’t get very hungry anymore, I went from 210lbs to 175lbs. Blood pressure dropped, all my metabolic blood panels greatly improved. Been doing this for over a year and feeling better at 70 than I felt at much younger age.

    • @telolisou
      @telolisou 8 หลายเดือนก่อน +3

      Congratulations. It is great to hear about your success.

  • @pickledbeaker5916
    @pickledbeaker5916 4 ปีที่แล้ว +92

    Hoping to hear about studies regarding the potential benefits of fasting outside weight loss b4 going to the downsides and wrapping the series...

    • @matheuscervo892
      @matheuscervo892 4 ปีที่แล้ว +4

      Yeah, I was looking for a deeper look about diseases and intermittent fasting

    • @bonniek7228
      @bonniek7228 2 ปีที่แล้ว +2

      Yes, me too. I don’t want to lose weight. But do want to be healthy.

  • @hunterjaynes3412
    @hunterjaynes3412 ปีที่แล้ว +59

    I have been alternate day fasting for 1 week now and every feasting period I seem to need less and less to be satisfied. The hunger during fasting is also becoming easier each day. 40 hour fast with 5 hour eating window is working for me.

    • @TC-yx1qt
      @TC-yx1qt ปีที่แล้ว +2

      Are you still doing alternate-day fasting six months later?

    • @ArleneHeer
      @ArleneHeer 9 หลายเดือนก่อน

      How are you doing now?

    • @shanDalicous
      @shanDalicous 7 หลายเดือนก่อน

      How many calories does a person eat on the feast day?

    • @haykojan6590
      @haykojan6590 หลายเดือนก่อน

      Same ❤

  • @MikeCola
    @MikeCola 4 ปีที่แล้ว +11

    Proven Benefits Of Intermittent Fasting
    - Promotes fat loss
    - Improves insulin sensitivity
    - Promotes longevity
    - improves hunger
    - improves brain function
    - improves immune system
    - reverses diabetes
    - improves fatty liver
    - reduces inflammation
    - improves cellular repair
    - normalizes blood pressure
    - Improves lipid parameters
    - rest for digestive organs

  • @lozgod
    @lozgod 2 ปีที่แล้ว +9

    How can someone benefit from a marketing standpoint from someone else NOT eating food?
    I find ADF easier than calorie restriction. It’s easier to say I can’t eat than I can only eat X much.

  • @broccool2300
    @broccool2300 4 ปีที่แล้ว +59

    Your videos are like intermittent fasting on information.
    Q: Is this safe for your health?
    A: We'll find out next.
    Q: Can I eat?
    A: We'll find out next.

    • @bush9518
      @bush9518 4 ปีที่แล้ว +2

      The cliffhangers are killing me!

    • @JustMe-mn4gr
      @JustMe-mn4gr 4 ปีที่แล้ว +3

      @@bush9518 ppfftt, I prefer speakers who just get to the point.

    • @gabrielahimsa4387
      @gabrielahimsa4387 4 ปีที่แล้ว +2

      until we puuuut it tothe test

  • @deborarovercipili3865
    @deborarovercipili3865 2 ปีที่แล้ว +22

    Media built us to think about food all the time, and make weight loss seem something impossible to archive, but the truth is weight loss is much more simple than that. I’ve been fasting for a little bit over a month and lost almost 20lb. I do alternate day fast, feast fast repeat.
    I honestly feel great, lot of water and coffee on fasting days, but on feast days I eat whatever I want as long as it’s not processed food (still eat my pasta and rice) and make sure I eat some veggies and protein, I would still have a little dessert on feast days but I don’t feel as guilty because I know I can fast the next day and my body will get rid of that before it turns into fat.
    Fasting changed my life and my relationship with food.

    • @Alexjandro1991
      @Alexjandro1991 4 หลายเดือนก่อน

      Sounds like you were doing good, how is it going 2 years later?

    • @deborarovercipili3865
      @deborarovercipili3865 4 หลายเดือนก่อน

      @@Alexjandro1991

    • @deborarovercipili3865
      @deborarovercipili3865 4 หลายเดือนก่อน

      @@Alexjandro1991 I'm doing great. I lost 37 pounds in 2022 and have been able to keep it off since then. I don't fast anymore, except occasionally and intermittently, not on alternate days. I started weight lifting and gained a few pounds back, but my body has changed a lot as I've gained muscle mass. I still recommend fasting to anyone who is looking to lose weight.

  • @jesscnelson
    @jesscnelson 4 ปีที่แล้ว +19

    Dr Gregor you are the King of the cliffhanger!!! I want to know which is the safest and most effective way to fast. I guess I should work my patience.

  • @phxrsx
    @phxrsx 4 ปีที่แล้ว +19

    I fast when I sleep.

  • @powernoodle1224
    @powernoodle1224 4 ปีที่แล้ว +7

    This is a terrible series of videos. Lots of talking, but no thesis or conclusion is ever reached. We keep waiting for Greger to get to the point - which never happens. Each video is just an advertisement for the next video, which itself is an ad for the one that follows. And what Greger does say seems to be in complete opposition to every other study on the subject.

    • @rosev.4463
      @rosev.4463 4 ปีที่แล้ว +2

      He said he'd be discussing the studies of different aspects of fasting for weight loss and then tie it all up in the end of the series, but it is a bit frustrating. And then I keep confusing purpose of fasting between weight loss and autophagy which are 2 different ball games. I hope he touches on that in the end discussion.

    • @Crazydoglady.
      @Crazydoglady. 4 ปีที่แล้ว

      🙌

  • @peterscott2662
    @peterscott2662 4 ปีที่แล้ว +49

    It really seems like the alternate day, all you can eat above ground veggies, would likely improve the quality of most peoples diets.

    • @bookmouse2719
      @bookmouse2719 4 ปีที่แล้ว

      well, eggplant & zucchini would definitely help.

    • @Adenohypophysis0
      @Adenohypophysis0 4 ปีที่แล้ว +1

      that's a great idea! Eat all above ground veggies

    • @hermanharper4594
      @hermanharper4594 3 ปีที่แล้ว

      Increasing the fiber nutritiant dence diet as well good all around idea. Whole food plant based diet ADF got it

    • @ThuyNgo-gg4hc
      @ThuyNgo-gg4hc 3 ปีที่แล้ว

      @@bookmouse2719 Cpppì hy

    • @PlantbasedSilvi
      @PlantbasedSilvi 6 หลายเดือนก่อน

      Habe mir die Studie rausgesucht, die haben das 3 X in der Woche gemacht. Ich mache das jetzt erstmal 2 X in der Woche, weil ich schon pflanzenbasiert, fettarm und vollwertig esse, aber ab und zu mal ins Restaurant gehe. Nehme ich nicht ab, dann 3 X die Woche. Es bringt nichts, wenn man sein Essverhalten nicht ändern. Habe mir Rohostrezepte rausgesucht, die ich dann auf 47 C erhitze und Habe mir Suppen rausgesucht, werde noch Kelp Nudeln ausprobieren

  • @JessBisme123
    @JessBisme123 4 ปีที่แล้ว +66

    These studies didn't look at true alternate day fasting where you fully abstain from food for 36 hours. 500 calories, especially dispersed thru a day, would impact your insulin spikes.
    Idk, I've lost 56lbs so far over the course of a year and a half using variations of intermittent fasting, occasionally periods of adf included. Works for me. 😊

    • @davinehill3448
      @davinehill3448 4 ปีที่แล้ว +13

      Incessant Goi 2 that’s bcuz she was extremely morbidly obese. The bigger you are the more you lose bcuz you naturally burn more calories 🤷🏽‍♀️

    • @mtnunicycler
      @mtnunicycler 4 ปีที่แล้ว +6

      Good point Jess! Sounds like you are finding success with fasting. Hurray for personal gains! 🍎❤

    • @artbigotti2640
      @artbigotti2640 4 ปีที่แล้ว +6

      JessBisme123 I have had similar results! I’ve lost 32 lbs in 10 months using various forms of IF. I’m with you-I’d love for Dr. G to look at true ADF studies. Congrats on your success!

    • @JessBisme123
      @JessBisme123 4 ปีที่แล้ว +5

      @Incessant Goi 2 intermittent fasting is done intermittently. Lol. I don't do long fasts over 3 days, and I only do those about once a month or once every other month. I'm healthier than I have been in years, and it feels like this is something I can do for the long haul, so yes. I'm pretty content with my results. :)

    • @JessBisme123
      @JessBisme123 4 ปีที่แล้ว +3

      @@artbigotti2640 that's awesome, art! I like IF because I don't have to be perfect at it for it to work. Fasting also helps reset you if you've been under stress and not eating so great. A quick 1-3 day fast helps get you back on track. I also love its flexibility. Really hungry one day? Have an 8 hour eating window. Not so hungry? Eat one big meal. Want a challenge this month? Do ADF. Variation is the spice of life! Lol.

  • @machomalli
    @machomalli 4 ปีที่แล้ว +11

    Thanks doc!! That's why I'm so determined to follow only 16*8 intermittent fasting for the rest of my life!!!

  • @fire7side
    @fire7side 4 ปีที่แล้ว +9

    I look at it as something to do on top a healthy diet of whole foods. I fasted one day a week eating 3 meals a day, no snacks the other days, and lost the last 20 lbs that got me to bmi normal. It helps even when you don't fast because spacing meals is much easier.

  • @Zett76
    @Zett76 4 ปีที่แล้ว +6

    Obsessing over weight loss again... 🙄
    It‘s not the only benefit.

    • @DerekJojenCummings
      @DerekJojenCummings 4 ปีที่แล้ว +3

      @Quack Watch I disagree, most people probably care more about fat loss and muscle retention then weight loss

  • @BoogieBoogsForever
    @BoogieBoogsForever 4 ปีที่แล้ว +9

    Great series.
    It would be great to see any info on what type of weight was lost; was it fat, water?
    Also, if possible, could you let us know if you came upon any info of whether people keep or lose muscle mass during adf?
    Thanks for your great work!!

  • @divdep3612
    @divdep3612 4 ปีที่แล้ว +8

    If there could be a video to do with alternate day fasting and other health problems like inflammatory or cardiovascular, then this would be very insightful. I know for a fact it's great for weight loss and mental clarity to do these fasts regularly, but just need more science based factual information on how these fasts help reduction in inflammation, joint pains, skin problems, and many more issues that many people have and have also switched to a plant base diet to counter these problems.
    I believe a combination of whole food plant based eating and fasting is one of the keys to possibly reducing many health issues that people have and are constant in this day and age. Just need someone to help support it with some more science evidence.

    • @marionheita7935
      @marionheita7935 10 หลายเดือนก่อน +1

      Check out Dr Mindy Pelz videos, they’re really helpful and research backed explanations… all the best.

  • @philddlesticks
    @philddlesticks 4 ปีที่แล้ว +2

    This is pointless because people regain the weight later on PLUS more. It is better to increase metabolism than to starve.

  • @ERICPJ54
    @ERICPJ54 4 ปีที่แล้ว +12

    Some claim that narrow window intermittent fasting encourages autophogy is there any research to back up this claim? Thanks!

    • @levansegnaro4637
      @levansegnaro4637 4 ปีที่แล้ว +2

      Fasting does elevate ampk and sirtuins, both proven to extend life.

    • @jenm1
      @jenm1 4 ปีที่แล้ว +9

      @@MsSpicynipples That is absolutely not true. There is science showing benefits of fasting 12+ hrs during a 24 hr cycle, and fasting before bed improves sleep, due to the deep-set circadian rhythm of your body

    • @jenm1
      @jenm1 4 ปีที่แล้ว +3

      @@MsSpicynipples Yes, as if I would pull that out of thin air. Good luck to you

    • @yuliankarapetkov
      @yuliankarapetkov 4 ปีที่แล้ว +1

      Google Yoshinori Ohsumi

    • @philddlesticks
      @philddlesticks 4 ปีที่แล้ว

      @@jenm1 bs it doesn't help anyone sleep when fasting it gives you a surge of stress hormones

  • @phatvegan1691
    @phatvegan1691 4 ปีที่แล้ว +8

    Your videos are AMAZING!!

  • @joec4720
    @joec4720 4 ปีที่แล้ว +8

    Dr. Greger, there are many reports about Impossible meat having linked to glyphosate. Is there research or videos you can show on these alternative meats and how safe they may be?

    • @GustavMahlerHorn
      @GustavMahlerHorn 4 ปีที่แล้ว +5

      Dr greger promotes whole food plant based, not vegan junk food. Not sure if it's really his expertise.

    • @fedoratheexplora7180
      @fedoratheexplora7180 4 ปีที่แล้ว +2

      Its pure garbage read the ingredients.

    • @daveforgot127
      @daveforgot127 4 ปีที่แล้ว +1

      This has nothing to do with his video use your brain

  • @wgjung1
    @wgjung1 ปีที่แล้ว +2

    You mention marketing so what are they selling? I mean the people who promote fasting, what's the product behind it?

    • @Pj_animate
      @Pj_animate 6 หลายเดือนก่อน

      health

  • @brandonswan9247
    @brandonswan9247 4 ปีที่แล้ว +26

    Dr Greger is looking at everything through a weight loss filter because of his new book how not to diet. I wish we could get a more holistic view of these subjects.

    • @eelkeaptroot1393
      @eelkeaptroot1393 4 ปีที่แล้ว +7

      Yes, there's that and there's also tonnes of questions about this topic from the public even more so because of tonnes of non-doctors like random vloggers and bro-scientists promoting random dieting concepts to achieve certain superficial goals...

  • @LTPottenger
    @LTPottenger 4 ปีที่แล้ว +25

    This is what I do lately, except I eat zero calories on the off day. Working great so far.

    • @derekaring574
      @derekaring574 2 ปีที่แล้ว

      what do u eat on feast days anything u like or diet food?

    • @LTPottenger
      @LTPottenger 2 ปีที่แล้ว

      @@derekaring574 I eat zero carb on the first meal then after a few hours I eat normally

    • @TC-yx1qt
      @TC-yx1qt ปีที่แล้ว +1

      3 years later.. are you still doing alternate day fasting?

    • @LTPottenger
      @LTPottenger ปีที่แล้ว

      So funny to see this old post! I do a 36h fast every week and 72-96 every month @@TC-yx1qt

    • @candacelashae4236
      @candacelashae4236 ปีที่แล้ว

      Good question

  • @Turistang_Pinoy
    @Turistang_Pinoy ปีที่แล้ว +4

    I have been in IF for 15 months. Started with it when my knees hurt which at that I time I suspected I'm overweight which eventually I realized I'm correct. From 72kls , I know weights 56kls with a bmi of 20.8. I used 18:6 IF and haven't tried ADF. I'm still losing weight very little, like 1 kilo in the last 6 weeks. Feeling light and great 😀

  • @lynxxxnyl
    @lynxxxnyl 4 ปีที่แล้ว +6

    I'm loving these fasting videos!! Extremely helpful and informative! Thank you! I hope they keep coming! I'm very curious about the effects of total calorie absence on fasting days with a every other day eating pattern!

  • @DerekJojenCummings
    @DerekJojenCummings 4 ปีที่แล้ว +4

    If your going to do an intermittent fasting series, then your going to have to touch base on the 21hr fast human growth hormone benefit and whether or not it's a myth or not. Because at least half of the IF community isn't doing it just for fat loss, but for HGH increase. Additionally, you'll need more detailed data on actual fat loss vs general weight loss. If people can retain more muscle on IF then it's better........ Lastly, touch base on the life expectancy increase from IF. Thanks!

    • @philddlesticks
      @philddlesticks 4 ปีที่แล้ว

      Did you know, higher HGH isn't associated with longevity or health in old age

  • @saddq1
    @saddq1 ปีที่แล้ว +8

    I was overweight in my twenties, gradually gaining weight until my 30th birthday. Then, I made the decision to use alternate day fasting to quickly lose weight, not consuming any calories on Mondays, Wednesdays and Fridays, and eating carbohydrate-rich pasta on the other days. Result: I lost 20 kg in two months time and managed to keep the weight off until my late 30s, even when resuming my previous calorie-rich lifestyle.
    Now, in my early 40s, I have started a similar regime, though I do not fast so regularly anymore.

    • @PlantbasedSilvi
      @PlantbasedSilvi 6 หลายเดือนก่อน

      Hatte eher Angst vor einem JoJO Effekt, deshalb nur 2 X die Woche, weil ich das mein Leben lang durchhalten kann. Später gehe ich ja auch wieder in ein veganes Restaurant essen, da kann ich allerdings nicht ohne Ől essen, da mache ich dann einfach danach einen Geműsetag.

  • @heykeke428
    @heykeke428 4 ปีที่แล้ว +5

    Thanks for this video! I’m so grateful I found intermittent fasting 💖

  • @GoldenMom1921
    @GoldenMom1921 4 ปีที่แล้ว +5

    Thank you Dr. Greger! ✌️💙🌱

  • @ricardourroz9322
    @ricardourroz9322 4 ปีที่แล้ว +2

    Intresting video. 2 things aren´t mentioned here. The insuline response while eating 500calories vs 0 calores. And the autophaphy effect which you need to be on starving mode, 0 calories. Not some calories :)

  • @susanaplantbasedadoptacat1677
    @susanaplantbasedadoptacat1677 4 ปีที่แล้ว +4

    this was the next logical question after the last videos! i already suspect what the results will be!

  • @ooo789456123
    @ooo789456123 4 ปีที่แล้ว +12

    A whole food plant based diet 🍅🍏 constantly, gives you great results. Don't stress too much about always being fed. My experience is 2 meals a day work great long term, 1 meal to lose weight for short term periods. Enjoy life🤾

    • @ooo789456123
      @ooo789456123 4 ปีที่แล้ว +5

      @Incessant Goi 2 did you eat whole foods? Plants only? Hard to gain weight if they are not processed or don't have added oil & sugar.

    • @jesscnelson
      @jesscnelson 4 ปีที่แล้ว +1

      How do you manage hunger? I find that if I eat whole food plant based with low oil, I tend to overeat due to hunger and I usually end up gaining weight. What foods do you eat to feel satisfied?

    • @AH-cy4md
      @AH-cy4md 4 ปีที่แล้ว +2

      niceviewer potatoes, especially sweet potatoes, grains, and legumes are great for feeling fuller longer.

    • @ZenKloom
      @ZenKloom 4 ปีที่แล้ว +2

      @@jesscnelson Starchy foods like potatoes, rice, groats, etc.

    • @jesscnelson
      @jesscnelson 4 ปีที่แล้ว +1

      Spirit Pony yeah those are the foods that I gain weight eating. I tend to do better with less starch but I don’t want to have to eat meat to stay lean.

  • @2008aa6
    @2008aa6 4 ปีที่แล้ว +2

    What about bowel movements when people do IF? How does that go? Thus far if I’ve learned anything from plant based doctors is that the larger the end products, the better your body’s ability to keep diseases at bay!

  • @lloyddarbon5034
    @lloyddarbon5034 4 ปีที่แล้ว +2

    I fasted for 7 days, about 6 months ago. Just water. I lost 1kg per day for the first five days. Stopped feeling hungry at day 3 and was more energetic, physically and mentaly. At day 5 I stopped losing as much weight (about 0.2kg per day). I'm not recommending this to anyone, just sharing my personal experience.

  • @BlahBlahPoop617
    @BlahBlahPoop617 4 ปีที่แล้ว +3

    Exercise and calorie deficit increases autophogy...

    • @Crazydoglady.
      @Crazydoglady. 4 ปีที่แล้ว +1

      @Plantbased Outdoors 🤣🤣🤣🤣🙌

  • @UncleSiam
    @UncleSiam 4 ปีที่แล้ว +8

    I've personally been thru several prolonged Fasts. 21 days, 55 and 60. Prolonged Fasting I feel is much easier than alternating day or low caloric daily consumption.
    The body goes into full fat storage usage. Eating things intermittently seems to confuse the body to hold onto fat and maintain Ghrellin cycles.

    • @imamea7946
      @imamea7946 2 ปีที่แล้ว

      55 and 60? Just water or electrolyte water or juicing or?

  • @RabbitFoodFitness
    @RabbitFoodFitness 4 ปีที่แล้ว +5

    This is an awesome video! It's interesting to see if and how alternate day fasting works. Keep up the good work Dr.Greger!

  • @JavierBonillaC
    @JavierBonillaC ปีที่แล้ว +1

    I’d love to know if in “The effects of modified alternate-day fasting” they describe if those vegetable can be taken with olive oil and vinegar dressing. Otherwise it’d be like a cow’s diet.

  • @deepakhiranandani6488
    @deepakhiranandani6488 4 ปีที่แล้ว +6

    Unrestricted amounts of above ground vegetables sounds good for 'fast' days. A clever idea, this seems doable and good as an option at least, on certain days. It could take the form of a hearty stew, with a sauce of cooked tomatoes and spices and flavourings. I suppose onions though below ground could be permitted.

    • @LisePlansandJournals
      @LisePlansandJournals ปีที่แล้ว

      Then you would not be ‘fasting’ nor fasting.

    • @LisePlansandJournals
      @LisePlansandJournals ปีที่แล้ว

      Fasting means refraining from eating for a period of time. Above ground, below ground or outer space.

  • @vasiliss.2426
    @vasiliss.2426 4 ปีที่แล้ว +2

    I do hate the "We'll find out next" part. It's something I follow, fast helped and I lost a lot of weight... only to find out about thiamine and dying. I would be interested in finding out if I'm about to die or not...

  • @arleneehrlinspiel5232
    @arleneehrlinspiel5232 4 ปีที่แล้ว +3

    I would be interested in knowing if participants of any of the studies exercised while they were fasting and what the results were.

  • @dhlong1697
    @dhlong1697 ปีที่แล้ว +1

    It's very hard to overeat on a no-carb diet, though. Even after a few days fasting, satiety is quicker.

  • @GNP999
    @GNP999 4 ปีที่แล้ว +12

    Why bother showing this short term data. It is meaningless, with all do respect.

  • @SsesssGamB
    @SsesssGamB 2 หลายเดือนก่อน

    You guys did a great job explaining such a complex topic as the Alternate day fasting diet. I did understand the existing facts about this diet because of your video. I'll watch the video again in the future to remind myself of those facts and follow the right thing for me and my health.

  • @pessumpower
    @pessumpower 4 ปีที่แล้ว +3

    We live on a world where some people think than not eating all day falls in the "fasting" category, lol. If you are eating at least once a day you are not fasting, period.
    Do you think people of old times (without gas, fridge and precooked ready-to-eat foods) would wake up and start a fire/oven for cooking? People would wake up, work their ass all day (often to procure food) and then relax, cook and eat in reunion with their families/friends.
    Most modern city humans are addicted to exogenous energy, losing the ability to function without their timed calorie dose.
    If you have a healthy bodyfat level on you, and you feel drained and weak because you did not eat anything today (or you skipped a meal), then you've got some metabolic training to do.

  • @Smoove_J
    @Smoove_J 3 ปีที่แล้ว +1

    In my personal experience, this feeding schedule should be called the intermittent diarrhea plan. I guess it’s one way to lose weight.

  • @Isthtpie
    @Isthtpie 4 ปีที่แล้ว +1

    These short, shallow water superficial studies are pathetic.

  • @dvdmon
    @dvdmon 4 ปีที่แล้ว +1

    Last Friday I only ate greens and broccoli, but limited it to 6 fist-sized servings throughout the day Ala Esselstyn. Pretty hard, so maybe this week will try unlimited non-starchy veggies. I don't really need to lose weight but I do have a small stubborn bit of adipose tissue around the belly. BMI is 22...

  • @GNP999
    @GNP999 4 ปีที่แล้ว +2

    Please show data on audits that have followed subjects more than 3 years, and ideally 10 years

    • @GNP999
      @GNP999 4 ปีที่แล้ว

      Subjects *

  • @JustMe-mn4gr
    @JustMe-mn4gr 4 ปีที่แล้ว +1

    Healthy ketosis, IF, OMAD work regardless of what any study seems to show.

  • @hard2getitrightagain314
    @hard2getitrightagain314 7 หลายเดือนก่อน

    It isn't fasting if you consume "a few hundred calories" on the fasting day. "

  • @LCTesla
    @LCTesla 4 ปีที่แล้ว +1

    intermittent fasting only got popular because keto/atkins dieters had to plug an obvious hole in their dietary philosophy: that you can't lower the calorie density of food when you get your calories from fats. absent this restriction there is little point to torturing yourself by restricting all food for any duration. just eat when you want to, but eat calorie sparser foods that satisfy you and taste great.

    • @swissladydriver8980
      @swissladydriver8980 4 ปีที่แล้ว

      When you eat a high fat diet you won't have spikes of hunger multiple times a day. I didn't intend to eat in an intermittent fasting style, but I found that since I've been eating a high fat diet, I'm almost never hungry in the morning, so I have coffee and a small snack with my colleagues at About 1030-11:00 am, then a relatively small lunch at around 1:30 - 2PM and dinner at around 8 PM. No snacks in between because I'm simply not hungry. My personal experience has been that eating less calorie-dense foods causes generally more eating and snacking overall.

  • @walterbyrd8380
    @walterbyrd8380 4 ปีที่แล้ว +8

    One of the great advantages of fasting, I always thought, is that: after a while, you no longer feel hunger. That makes fasting easier than other diets.
    Fasting on alternate days would mean you are distracted by hunger half the time. You may even have trouble sleeping.

    • @JessBisme123
      @JessBisme123 4 ปีที่แล้ว +2

      I fast pretty regularly. Some days I skip eating because I'm not hungry and haven't really thought about it. 🤷🏼‍♀️ Usually happens on the weekends when there's fun stuff going on that keeps me busy. 😄

  • @yuliankarapetkov
    @yuliankarapetkov 4 ปีที่แล้ว +1

    Why have you taken only weight loss into account? A vegan diet, combined with regular periods of fasting is the best way to keep your body healthy.
    A friend of mine could not have a baby for more than 10 years. After doing 4 10-day fasting cycles, together with eating only raw vegan food in between them, she finally got pregnant and gave birth to a happy healthy child.
    In addition, the 2017 Nobel prize winner on medicine Yoshinori Ohsumi did quite an amazinf research on the subject

    • @philddlesticks
      @philddlesticks 4 ปีที่แล้ว

      Maybe the guy was shooting blanks and had nothing to do with fasting or raw foods..

  • @SuperSarification
    @SuperSarification 4 ปีที่แล้ว +1

    I’m sorry but some of the results you cite are misinterpretations of the studies. I picked at random the Iranian study and they don’t say that on the fast days you only eat “above the ground” vegetables. They simply say that on the 3 fast days test subjects eat 30% of their caloric needs and that non-starchy veg are always unlimited

    • @kathivy
      @kathivy 4 ปีที่แล้ว

      SuperSarification non-starchy vegetables are the above-ground vegetables. Most below-ground vegetables like carrots, beets, potatoes, parsnips are starchy.

    • @SuperSarification
      @SuperSarification 4 ปีที่แล้ว

      Katherine Ivy I know. I used them as synonyms. That was not the point...

  • @RafaelBirkner
    @RafaelBirkner 4 ปีที่แล้ว +1

    Doc. please - it must be obvious it's not about the calories, it's all about the insulin/glucagon levels...

  • @anupamkhemariya9128
    @anupamkhemariya9128 4 ปีที่แล้ว +1

    The most wise comment on fasting is given by Dr.Mcdougall only.This wisest Doctor explained that if you eat whole food starches...u r taking lower and cleaner calories but no hunger.Eating starches is more scientific than any other fasting.Fasting is good for the people who have no idea of human food.

    • @Crazydoglady.
      @Crazydoglady. 4 ปีที่แล้ว

      Starches make you hungry as f*ck... fasting makes you not hungry.

  • @yudy92
    @yudy92 4 ปีที่แล้ว +2

    This is such a good combination of studies put into a very informative video! thank you Doc.!

  • @PadawanLearner1970
    @PadawanLearner1970 4 ปีที่แล้ว +1

    Why have the two videos on time restricted eating been removed please?

  • @SherriAI
    @SherriAI 4 ปีที่แล้ว +1

    Hello Mr Greger. I just watched a bunch of people healing cystic acne with vitamin b5 superdose, after trying everything else... this seems as a really simple solution for such a complicated issue. Has there been any research on this... why is this not widely available information. Any information that you can share on this will be highly appreciated and acurate.
    Great video as always!

  • @NewWorldOrderx0x1
    @NewWorldOrderx0x1 7 หลายเดือนก่อน

    Start Fasting Tomorrow Try As Long As I Can!!

  • @arh7303
    @arh7303 4 ปีที่แล้ว +14

    I'm a huge fan❤ two questions: 1 when the body runs out of glycogen stores and turns to fat only, how much muscle wasting occurs compared with continuous caloric restriction for these shorter fasts? I'm remembering your videos about longer fasts and also ketogenic diets. 2 how much has gender differences been studied? I've dabbled with IF, and despite having weight to lose and not going too crazy during "feeding" times, i didn't lose weight, one month I even gained 5 pounds! I've heard that in at least the case of fasting, men and women's bodies react differently. As slways looking forward to future videos.

    • @ononono7016
      @ononono7016 4 ปีที่แล้ว +3

      This channel has multiple videos on long term fasting and somewhere are two or so graphics comparing long term fat and muscle loss between people fasting and people having a normal calorie restriction.
      It was something like you losing more muscle and really less body fat in the beginning of long term fasting and that your fat storage gets mainly attacked after the 3rd-week mark of not consuming food.
      For example:
      th-cam.com/video/P6WsELDaNwM/w-d-xo.html
      6:58 "Less than half of the weight loss during the first few weeks of fasting ends up coming from your fat stores."
      And right afterwards is another example.

    • @dis4980
      @dis4980 4 ปีที่แล้ว

      @@ononono7016 what test was he using. If dexa scan results arent accurate because water and glycogen count as muscle to the dexa scan

    • @ononono7016
      @ononono7016 4 ปีที่แล้ว

      @@dis4980 I am not sure but this channel cites its sources and you can look up the studies easily.
      Click on cited sources on this website:
      nutritionfacts.org/video/is-fasting-beneficial-for-weight-loss/

  • @veg
    @veg 4 ปีที่แล้ว +1

    This was a long video 😊

  • @NewEarthWellness
    @NewEarthWellness 4 ปีที่แล้ว +1

    What about evening and night fasting? Like no food between 6 pm and 6 am? How would that affect weight loss?

    • @brankobakic9744
      @brankobakic9744 4 ปีที่แล้ว

      Try it and see for yourself?

    • @JP-tq7ni
      @JP-tq7ni ปีที่แล้ว +1

      12-12 Not enough. Better to use 16-8. And skip dinner once or twice a week

  • @gustavcoetzee6837
    @gustavcoetzee6837 3 ปีที่แล้ว +1

    Im going to try this in quarintine

  • @NicgetsFit
    @NicgetsFit 7 หลายเดือนก่อน

    Thank you for sharing! I have been doing ADF this week and really enjoying the flexibility and cravings are lower! I did try OMAD and 18:6 but found I couldn’t control my eating and over ate!!

  • @Anarcath
    @Anarcath 4 ปีที่แล้ว +1

    I only eat one meal a day. The rest of the time I only have snacks: fruits, veggies and nuts. I’ve weighed the same for years.

    • @thesustainableindianjalebi5936
      @thesustainableindianjalebi5936 4 ปีที่แล้ว

      How many calories total?

    • @Anarcath
      @Anarcath 4 ปีที่แล้ว

      Mc Sia Around 2500. I rarely exceed this figure. I’m really anal about the whole thing though. I eat exactly 10 almonds, 3 walnuts, tbsp of raw pumpkin seeds and half a Brazil nut, with two bananas and 8oz of green Matcha tea. Just typing this makes me want to laugh.

  • @veganmikedizzle4303
    @veganmikedizzle4303 4 ปีที่แล้ว +1

    Can someone please just translate what he just said......is intermittent fasting yay or nay?

    • @brandonswan9247
      @brandonswan9247 4 ปีที่แล้ว +4

      He specifically looked at alternate day fasting. Don't eat every other day. He said that it can be good for weight loss if you can adhere to it. He left a cliffhanger about the safety of doing such things. The next video will be about the safety of this approach.

    • @veganmikedizzle4303
      @veganmikedizzle4303 4 ปีที่แล้ว

      @@brandonswan9247 thank you!

  • @TheBeardHack
    @TheBeardHack 11 หลายเดือนก่อน

    This guy gives some Tom Hardy vibes

  • @agnidas5816
    @agnidas5816 3 ปีที่แล้ว

    Studies done on people who are regularly eating toxins don't help us much actually... all it points out is the toxicity of the standard diet. These are terribly cherry picked and on an odd subject of every other day fasting which is rather rare protocol.
    It's just writing to get more books out ... not a good view into fasting.

  • @elba6811
    @elba6811 ปีที่แล้ว

    What an annoying intonation in his speech

  • @alonrido5037
    @alonrido5037 4 ปีที่แล้ว

    You discuss alot about weight loss but the gurus of fasting are claiming that digesting is a heavy process for our body thus eliminating it for a long period of time leaves the body with more energy to repair itself. What does the science say about that?

  • @khaledalqhtani8332
    @khaledalqhtani8332 2 ปีที่แล้ว

    Didn’t understand a thing, why don’t you give a clear samples of the schedule?

  • @SelphExploration
    @SelphExploration 4 ปีที่แล้ว

    I do IF because it is when I get hungry. I had gastric sleeve, in 2010, and I do not do well with putting solids in my stomach, most days, until around 12:30 pm. If I eat two small meals, I am good for the day. Sometimes I eat one large meal and then do not actually have room to eat anything else later. Because of my GERD, I do not eat for at least three hours prior to bedtime. Once a week, or so, I may wake up hungry, if I do, I eat. On the days I try to eat early, without hunger, I get nauseous...

  • @JustMe-mn4gr
    @JustMe-mn4gr 4 ปีที่แล้ว

    Hunger will depend upon whether you are already fat adapted or not. If you go into a fast after eating a steady diet of a lot of carbs instead of keto, you will suffer and it probably isn't even good to do... Eat keto or close to keto first.

  • @dinky..
    @dinky.. 2 ปีที่แล้ว

    I would love to watch this video but the way he speaks is infuriating to me 😬😬

  • @mrtrader4628
    @mrtrader4628 7 หลายเดือนก่อน

    But what about Autophagy?

  • @gypsypath1
    @gypsypath1 4 ปีที่แล้ว

    I hate to say it, but I would love to be able to afford (or grow) an ad libitum above-ground vegetable diet.

  • @gustavoazzo
    @gustavoazzo 4 ปีที่แล้ว

    As usual this channel casts lots of open opinions, casting doubts. IF goes far beyond weight loss.

  • @judytamoongoddess
    @judytamoongoddess 4 ปีที่แล้ว

    When on high carb diet IF is almost impossible to do, hunger and cravings are unbearable, I was weak and very agitated, now that Im on high fat diet its super easy and even when I dont eat for 18 hours I still have energy and Im calm, fat adaptation is def much better than running on sugar in my opinion, also appetite is not spiked so its hard to overeat.

    • @NLR759
      @NLR759 4 ปีที่แล้ว

      Judyta Maria I eat a high complex carb whole foods diet, and was able to water fast up to five days no problem.

  • @JPRamirez99
    @JPRamirez99 4 ปีที่แล้ว

    Guy sounds like Jaime Rivera from Pocketnow

  • @TATOTEMPRESS
    @TATOTEMPRESS 4 ปีที่แล้ว +1

    Many thanks for posting 🇬🇧

  • @kartikaytiwari7387
    @kartikaytiwari7387 8 หลายเดือนก่อน

    surprisingly biggest issue I have with ADF is that I'm not hungry enough, so I can't eat enough of nutrients and protein.

    • @MsSprasad1
      @MsSprasad1 7 หลายเดือนก่อน

      Make sure you eat in 8-12 hrs on eating days.

  • @a.maya12
    @a.maya12 4 ปีที่แล้ว +3

    Could you please explain deeper what related to insulin and insulin resistance by intermittent fasting. I have read Dr. Hiromi Shinya. But your opinion is always very important in order to feel sure.

  • @robertd1652
    @robertd1652 3 ปีที่แล้ว

    Where can I find more information about the Iranian alternative to fasting? Is there a complete list of above ground vegetables they were allow to eat and did they use salad dressing?

  • @MYfriendsknow
    @MYfriendsknow 4 ปีที่แล้ว

    I tried this and it didn't do anything for my weight loss?

  • @jtaiv2798
    @jtaiv2798 4 ปีที่แล้ว

    I can't eat for the first 8 hours of the day because caffeine kills my appetite, help

    • @jtaiv2798
      @jtaiv2798 4 ปีที่แล้ว

      @@jellechopper6961 cant!

  • @kyleg5202
    @kyleg5202 4 ปีที่แล้ว

    Big downside to IF - Gallstones

  • @musicbytoffie
    @musicbytoffie 2 ปีที่แล้ว

    Amazing video. Thank you 😊

  • @budekins542
    @budekins542 ปีที่แล้ว

    'Test fasting' is a good idea.

  • @hansfrankfurter2903
    @hansfrankfurter2903 2 ปีที่แล้ว

    this guy loves to stammer alot

  • @benwooster8876
    @benwooster8876 4 ปีที่แล้ว +1

    These studies are only a starting point. The only way to truly know is experiment on yourself and become an expert in understanding your own body and mind. Also, any expert worth their salt talking about fasting would have mentioned insulin sensitivity and autophagy but nope.

  • @danielgilliland8891
    @danielgilliland8891 4 ปีที่แล้ว

    If this channel comes out against intermittent fasting I am done with it. I am tired of the highly biased reports and cherry picked "studies".

    • @TenableVegan
      @TenableVegan 4 ปีที่แล้ว

      Off you go then, not a single person will notice. You must think you're so important to think your threat of being done with the channel is going to have any impact on the content Greger decides to cover.

    • @danielgilliland8891
      @danielgilliland8891 4 ปีที่แล้ว

      @@TenableVegan looks like someone is mad

    • @danielgilliland8891
      @danielgilliland8891 4 ปีที่แล้ว

      @@TenableVegan If you want to look at scientists who do their own actual long term studies look into Dr. Valter Longo and Dr. Sachin Panda. Dr. Rhonda Patrick and many others have also spoke at length on the topic of intermittant, long term fasting, and a fasting mimicing diet.

  • @manzg1
    @manzg1 ปีที่แล้ว

    Very very informative

  • @TheaDragonSpirit
    @TheaDragonSpirit 4 ปีที่แล้ว

    So eat normally, then have a green smoothie day. Kind of like the documentary: "Fat, sick, and nearly dead", except not doing green smoothies every day, but every other day.

    • @rosev.4463
      @rosev.4463 4 ปีที่แล้ว

      That movie was about juicing, and boy is there a difference. I did it for a week and lost 18 pounds that stayed off for over a year, but I couldn't do it again. I had zero will power. The actual juicing took so much time and effort. Dr. Gregor did a video about smoothies not being preferable to eating your veggies. I remember something about enzymitic activity in chewing and digestion. I still want to try smoothies again, at least to start. It's gotta be better than doing nothing😉

    • @Crazydoglady.
      @Crazydoglady. 4 ปีที่แล้ว

      Theadragonspirit....Sounds like a good idea to me 👍

  • @rheamorales1329
    @rheamorales1329 4 ปีที่แล้ว +2

    I tried this and gained weight. My best plan for losing weight is to give up snacking and eat 3 meals daily of at least 500 calories and exercise an hour or more. I don't remember the study, but read that fasting in postmenopausal women is ineffective 75% of the time.

    • @Skweepa
      @Skweepa 4 ปีที่แล้ว

      Oh, wow, didn't hear that about post menopause. But I do remembering that one hour of exercise per day was the magic number in one study that studied people who lost weight and kept it off long term.

  • @daniellugo4272
    @daniellugo4272 4 ปีที่แล้ว +3

    great channel great content

  • @atchoume8196
    @atchoume8196 4 ปีที่แล้ว +6

    when i did intermittent fasting, my hair started falling out. my stomach is way too little to get all my nutritional needs in such a short time span.

    • @wildcard2884
      @wildcard2884 4 ปีที่แล้ว +4

      because you were probably eating junk and getting no nutritional value per calorie. your fault. YOUR FAULT! NOT MINE!

    • @brioche8123
      @brioche8123 4 ปีที่แล้ว +3

      Atchoume well if you say your stomach is small, it’s likely you don’t eat that much to begin with. Also, how nutrient dense is your food? Adding intermittent fasting to the mix, your overall calorie intake may have been wayyy too low. Hair falling out is common when you’re just not eating enough. It’s common with anorexics (not saying you have AN). I hope you’re eating well now

    • @Deffine
      @Deffine 4 ปีที่แล้ว

      @Wild Card You sure its not your fault?

    • @atchoume8196
      @atchoume8196 4 ปีที่แล้ว

      @@wildcard2884 I am whole food plant-based vegan. I do not eat junk food.

    • @atchoume8196
      @atchoume8196 4 ปีที่แล้ว

      @Incessant Goi 2 the hair loss is due to calorie restriction and not eating enough. I am a grown man. Unless I am overeating on fat, I can not get enough calories in that short time.