Are Seed Oils Inflammatory?! (The *Evidence* No One Shows)
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- เผยแพร่เมื่อ 12 มิ.ย. 2024
- "Seed oils are inflammatory!" according to every blog and podcast. But what does the science say? The evidence on 9 different seed oils, heated seed oils and genetic variability. A complete look at seed oils & inflammation and all the evidence you were never shown.
Are seed oils inflammatory?
1. seed oil on inflammation
2. Heated seed oil
vegetable oil is inflammatory? Only seed oils are inflammatory? Depends on omega6s, Linoleic acid?
flaxseed oil not inflammatory. omega3 rich, can be anti-inflammatory
canola oil: CRP didn't change
saturated fat vs omega 6s. replaced saturated fat with unsaturated fats (canola and sunflower). no change in inflammatory markers
one trial compared canola to olive oil, found a reduction in CRP on both canola and olive oil
similar to flaxseed oil. anti-inflammatory?
~1tbsp sunflower oil daily. refined oil, treated with chemicals and heated, not cold-pressed. no significant change to CRP
“n-6 PUFA may act as anti-inflammatory”
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Animations: Even Topland @toplandmedia
References:
www.mdpi.com/2072-6643/8/3/13...
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Disclaimer: The contents of this video are for informational purposes only and are not intended to be medical advice, diagnosis, or treatment, nor to replace medical care. The information presented herein is accurate and conforms to the available scientific evidence to the best of the author's knowledge as of the time of posting. Always seek the advice of your physician or other qualified health provider with any questions regarding any medical condition. Never disregard professional medical advice or delay seeking it because of information contained in Nutrition Made Simple!.
#NutritionMadeSimple #GilCarvalho
0:00 Are seed oils inflammatory? Intro
1:36 Schools of thought
2:06 Flaxseed Oil
3:35 Science, Variability & Perception
6:00 Canola Oil
8:02 Sunflower Seed Oil
10:36 Sesame Oil
11:14 Soybean Oil
12:52 Corn Oil
14:00 Hempseed and Grapeseed Oil
14:31 Safflower Oil
15:42 Dose
16:52 Time
18:36 Acute changes in gene expression
19:45 Whole sources of fat
20:33 Heated Seed Oils
24:51 Summary
25:38 Seed Oil vs Junk Food
26:03 Funding
28:01 Biochemical mechanisms
30:42 Genetic variation
31:28 Dietary choices and emotion
I would like to see a study on whether comments about seed oils are inflammatory. 😊
comment of the day
They can lead to pretty painful inflammation, it seems, but It would be great if the evidence based comments are the most infectious.
@@NutritionMadeSimple find this interesting because, my husband eats so healthy, like basically Mediterranean diet with olive oil only. And I don't. Before we were together he was super healthy. I stirfry and deep fry alot with - canola oil and soy bean oil. I smother things in kewpie mayo; I eat Karage and katsu ect. In fact the healthies thing I eat is nato. He's black and I'm Japanese and white. My diet was literally killing him. Is it possible that it's inflammatory for black ppl? His LDL and HDL are so high and mine are all in side of the normal.
😂😂
@@longlostcoder6322maybe not because he's black, but maybe something unique to him?
Stumbled on this video today and I'm so glad I did. Thank you for keeping the principles of science alive and for doing all of the work compiling these studies. I wish there was more of this out there
Thanks for filtering thru all this research, very enlightening! Love your "no opinion" attitude. No drama! Refreshing and clear.
I have been into Immunology, immunotherapy and recent 7 years gerontology and metabolic therapy Research work in Asia. Total of 18 years. We are currently looking at the Japanese diet and the new "Green Zone" of the pool of southern China centenarians.
Similarly with rice and grains that have "new" rice or "old" rice, seed oils production and expiry date do contribute to its oxidation and rancidity impact especially in tropical S E Asia. The shelf life after opening the bottle is crucial in terms of using the seed oils for clinical trials. All these trials will start with a fresh new bottle. Individual consumption at home for casual stir-frying or deep frying means the bottle of oil can last for a few months. Rancidity if mild cannot be easily detected by an average person especially so if they are senior or elderly (slightly impaired smell and taste). Dining out has also one risk of having adulterated seed oils that are not fit for consumption.
Traditionally, the Japanese 1000 years ago did not use seed oils but mostly boiled their foods using soup based cooking methods.
Thank you Gil 👍💓👏for your indepth research and awesome contents.
Personally, moderation in consumption and buying and storing small bottles (not large) are my advice to those who stlll want to use seed oils. 🥰
That's an argument for storing them properly and not buying more than you can use within 4-6 months. If they are stored in a dark, cool place, the oxidation is much slower. Under refrigeration, you get almost double the shelf life, and some under refrigeration (like nut oils, sesame, and canola) can last 2-3 years.
I appreciated your careful, balanced approach. You're the first person I've found on the subject who took a fair look at each perspective and came to a fair conclusion without condemning anyone. Thank you! 😊
You are literally the best science channel I have found so far on YT!
Keep the insane work going!!!
You do like an entire lit review for each video, I’m in awe ❤️
Excellent presentation. I appreciate how thorough your research is on this. Like many who are dealing with inflammation I'm making healthy choices and always learning. Keep on with your work, this is great!
Thanks again,always great to get the clarification on these widely disputed subjects. Good to have someone doing the homework.
Very interesting and thorough video. Going through all these articles on the subject must have taken some time :) That someone goes through the actual research without prejudice is nice to see. Looking forward to watching more of your videos!
this video was a couple years in the making... :)
@@NutritionMadeSimple Unbelievable
@@NutritionMadeSimple 😮
I always told people that gut issues has been researched decades ago and I knew the root cause is from conflict shocking stress, foods has nothing to do with it...if anything, the most dangerous foods to put in your mouth today is vegetables because of glyphosate, bill gates and his boys buying out the fields to grow more poison for our guts to get sick from this poison so we can than medicate with his prescription drugs..buy organic or preferably from farmers market
@@NutritionMadeSimple omg!! Your amazing!
Just decided to comment and like every single one of your videos that I watch. The effort you put into them is very much appreciated.
What a well researched video. Thank you for sharing this valuable information! ☺️
Your videos are getting better and better Gil. Well-structured and easy to understand. Thank you for making the content.
Amazing content, produced by hard work. Its a shame you dont get the recognition you deserve, your videos could help a lot of missguided and confused people.
As usual you wrapped all that information into something making sense with reliable sources. Thanks 😊
Just wanted to pop in and say thanks for the videos you’ve made and are making. It can sometimes be hard to discern truth from fiction especially when many of us don’t have a background in a medical field. 10/10
I really appreciate that you read a number of studies then give us a breakdown of the findings and tell us what the preponderance of evidence shows. This really helps to clarify the picture. Thanks Dr Gill!
I love your honesty. Most of us simply want to manage our health. Getting clear unbiased information not influenced by current food fashion is sometimes hard.
IKR. Remember when they told us to switch to margarine from butter?
Wow Gil, the amount of reading and researching you have done on this topic is very impressive. I wonder how long it took you to put this video together, thanks very much for your hard work!
He said two years in a comment reply.
Thanks for a great video. I'm always impressed with the quality of research from this channel and the skill in communicating to a general audience. This is the best channel on nutrition hands down. Wish there were more channels with this level of quality for other areas of health.
i recently found your channel (within the last few days) and thank the lord i did. there’s so much hype and misinformation on the internet in the diet and nutrition space. unfortunately most of my family is highly susceptible to bad information online and constantly falls for the newest fad or extreme diet. so i’m constantly hearing this stuff. i try to remain metered and reasonable in my approach to these things, but often lack the scientific background to rigorously look into any of this myself, and i’ll be fighting talking points derived from an aggressive influencer who has manipulated the information in a convincing and emotional way, and it’s a losing battle. your videos are helping me a lot!
He's one of the few sane ones on here who: 1. is a real practicing MD, 2 doesn't specialize in opinion pieces over science, 3. doesn't pick fights with people he doesn't agree with. 4. provides references for his work, 5. talks about clinical trials
Excellent work as always! The only thing it was covered from my perspective was organic vs. conventional oils, in case there are this kind of studies. I hope this video has a follow up regarding the consumption effects of different types of oils on cholesterol levels.
Wow! What a comprehensive coverage of the oils! Kudos and very interesting results. Best coverage I have seen on the internet!
I appreciate this careful survey! It's changing my mind.
I'm a nutrition student and you're blowing my mind. Thank you for focusing on inflammation alone in this one. There is a lot of misinformation out there for sure!
You should check the amount of persons used on those trials. Kind hard to come to conclusions with such a few sample on all of those studies.
There are like 20 studies there. What more do you want? If you you use massive samples then youll start whining its epidemiology. @@helderduarte213 its embarrassing. Just accept you're biased.
I've been waiting for this video for so long. Thank you for your hard work and your willingness to dig deep into the subject without bias.
Thanks for your focused view on this hot topic! Every video your team puts out makes my family and me healthier and more science-driven consumers.
Great work in this video - congratulations :-) Thanks for all the hard and meticulous work along with references. I wish more videos for the general population on health topics took your approach.
I'm also a nutrition student 3rd year, motivated to study by all of the misinformation out there. I have just discovered your channel, the algorithms are working their magic for sure. I'm so grateful for all of your work. Navigating through the literature is tough going for some, but you present it in such a way that is so easy to understand. I appreciate your graphics too. Honestly, thank you so much. You have gained yet another new subscriber.
Then u better know to be hyper skeptical of any video with a title like (the evidence no one shows). It's in a way saying i know better then everyone else. Strategies consperisy people use.
If you start with the disproving "misinformation" card you will be left surprised at the fact that nutritional science does not work in absolutes which you seem to try to find. Keep humble and realize mechanisms have multiple ways of functioning and context matters, otherwise you'll fall under nutritional dogmas which this industry needs less, not more of.
@@TudorIrimescu I was about to say the same thing. Why not strive to provide accurate information supported with solid peer-reviewed research rather than using an over-politicized term like that about others' inflammation..
@@faikerdogan2802 To be fair, it's not "what I know" that is being promoted, it's peer-reviewed data as well as multiple studies on each oil and acknowledging possible weaknesses like weight loss affecting the changes in inflammatory levels etc. I think he did a good job overall.
@@faikerdogan2802 It is not "a way saying i know better" AT ALL.
I tell people that breathing is good for you, even essential for good health, but since I’m saying something positive about anything at all, they assume I’m being paid by big air
But then too much air is bad for you (hyperventillation), according to eg. the Buteyko system.
Maybe that's just hot air 😂
How dare you air your grievances in this way. I’m getting inflamed.
You've inspired me.
Big Air is up to it again.
Really well done video. Appreciate all your work answering these nutrition questions!
You're awesome and I really appreciate the work that you do. This is super beneficial in helping me figure out what is best for my family's diet. Thank you!!
Gil, many thanks on your research as I have been spooked by the internet "doctors" that claim that this is a area of concern. Please keep on giving this information as it is important to living.
There seems to be a strong connection between vegetable oils and macular degeneration. That “spooks” me a lot.
@@joecheffo5942 Wow. I wonder if it might be a trigger for certain genes?
@@joecheffo5942 Correlation does not equal causation. Macular degeneration is often genetic and runs in families. Excessive exposure to UV rays can also cause it. Since most people consume seed oils most of their life, and some people develop macular degeneration and some don't, no one can definitely say that seed oils contribute to development. The only thing I've seen is a grant proposal arguing for a study in this area. I haven't seen any published conclusions, just a lot of speculations.
@@joecheffo5942and an even stronger connection between Nicolas Cage movies and drownings. Spooky!
Finally a doctor who has really made a profoundly rational study of the subject! I thank and congratulate you for the research, and especially, conclusions.
Hey Doc, I'm so glad to have found your channel. You look at the question at every possible angle and apply critical thinking. Your hard work is much appreciated 👍
I stopped eating anything that could possibly have seed oil in it for 2 weeks and the really bad bloody ankle eczema I've had my whole life actually started getting much much better. Then I slipped up and ate a big bowl of chips and cookies, etc. and it came back in a couple days. Trying again now, and my ankle is getting much better after a couple weeks.
great example. problem could be any number of components of junky foods, from preservatives to coloring to flavorings. good reason to go easy on junk food. may have nothing to do with seed oil per se
@@NutritionMadeSimple True, but I've tried cutting out junk food, wheat, dairy, and other things in the past for weeks at a time with no benefit. However, this time, I targeted any kind of oil product other than tallow I rendered myself. I continued to eat popsicles and pancakes I made myself etc. It's obviously not a perfect experiment, but I am astonished at the results. I suppose I should wait until it completely heals up, then introduce in seed oil into my cooking to see if it causes it to return. But honestly, after decades of dealing with this, I don't know that I'd want to bring it back for science.
@@stepheninczech yeah no need, oil not necessary in one's diet, totally fine to leave out as personal preference
@@stepheninczech Lol, thanks for the brutal honesty. No doubt there's a limit for most of us as to what we'll do for science. 😂
@@lucasgroves137 I tried adding seed oils back into my diet for 2 weeks to see if my eczema would come back. No effect after 2 weeks. I then tried eating dashida soup base which gave some effect. Then I started eating doritos and my eczema got significantly worse. Still not sure exactly what is causing it.
I love how in-depth and as non-bias(as possible) you go. Earned my sub in one video
I am a recovering “youtube low carb influencer” watcher and your channel is helping me get off the wagon with facts!
Been there. It's very convincing when someone with a doctor title talks nonsense to someone like me who doesn't have this kind of education.
@@espenstoro I’m pretty educated on biology (not on nutrition though) and even I was fooled by low carb for a while. However I noticed that there were no improvements on it, so I started researching. It’s a shame how many people believe in keto and stuff. I wonder how many total years those influencers have reduced peoples lives by.
@@JoeARedHawk275 are there studies to show a low carb diet shortens life expectancy?
@@JoeARedHawk275 many people have great results on low carb diets so I don't know where you are getting that there are no improvements
Low carb or no carb? As a diabetic who wears a constant glucose monitor and doses insulin accordingly I can tell you insulin resistance is real and having a low carb diet keeps my insulin working very well. I’d say a low carb (not no carb) diet after 40 is essential.
Thank you so much for videos. The work of deciphering all of scientific studies out there on general health topics is very important. The media likes to only interested in feeding people junk science for ratings. Kudos to you for helping people navigate through this!
This is the best nutrition channel I have found yet. Good job!
Question:
You said that people replaced the oils they normally consume with the oils the researchers supply.
Considering the whole world uses seed oils in their food,... doesn't it make sense that you don't see many differences between before and after? They're replacing seed oils with other seed oils. 🤔
As to the studies that really increase linoleic acid,... they are replacing something with linoleic acid, I assume. Are they replacing carbs with fat?
Great job, Dr. Carvalho!
I'd be interested in learning about the effects of these oils (and other oils/foods in general) on ApoB levels.
The best video I have seen relative to overall clarity, unbiased openly comprehensive research supported believability. Thank you kindly.
Great video. Thanks for taking the time to make it. Definitely answers a lot of questions.
Love your videos! Being in the healthcare space and with a recent trend in lifestyle interventions, these are the types of topics and summaries that we need! I’d like to see a topic around different oils and their impact on weight gain, and with an interest more in the volume of fried foods that one eats.
Greatly appreciate the video! I know there is a large amount of confusion within my own industry around omega 3 vs omega 6 and if they are truly helpful for dry eye disease or not. Huge industry players butt heads over the published findings but they often vilify seed oils too, despite only giving a few selected studies to support their claims.
One question I had was about the conversion of ALa to EPA and DHA. Have you read much in your research around the conversion of ALA to EPA and DHA within the body?
That's (ALA conversion to DHA and EPA) a really good question in my opinion.
Not that popular but a more interesting question for me because it's not that clearly debunked (from what I've seen) and LA and ALA compete for the same enzyme (so there is a possible mechanism - but mechanisms are not predictive in nutrition at the moment).
@@tofu-munchingCoalition.ofChaos Two problems with ALA regarding its conversion and bioavailability.
1) omega 3:6 ratio(and quantity) in diet heavily influence conversion rate, which is between 1-10%
2) in 12 week human trials where they measured the effects of ALA on RCB serum concentrations of omega 3 they found an overal net loss of roughly 1% which was explained to be as result of competing for the rate limiting enzyme delta 6 desaturase.
So for anyone who thinks they can get their omega 3 from plant sources, like the super "healthy" flax seed oil that is supposed to have a 3:1 or 4:1 omega 3 to 6 ratio, you're realling getting a 0:1 ratio, at which point it becomes a matter of quantity.
For the OP and anyone else reading, basically what it comes down to is that it was long thought that because LA (omega 6) is the precursor to AA (arachidonic acid) and AA is a precursor to inflammatory cytokines, that ingestion of LA would therefore increase inflammation. We now know that LA doesn't actually increase tissue levels of AA, and therefore is not directly responsible for inflammation. BUT LA does directly compete for the rate limiting enzyme delta 6 desaturase as talked about above, preventing omega 3 from doing its job and promoting an inflammatory environment.
TL;DR stay away from excess omega 6, ignore ALA in favor of EPA and DHA, through fish(supplements) and/or algae. Be mindful of the type of fish also, just like is prominent in eggs and pork, omega 3:6 ratios are heavily dependant on diet. In some species of fish wild has a better ratio and or higher quantity of omega 3, and in some fishes it's actually the farmed type that is preferable.
@@ravecsucks6192 Algaes are plants, too.
I'm not at all convinced by mechanistical speculations.
For those end-point claims about for example inflammation ("promoting an inflammatory environment") I need direct evidence to believe it. And that is the rational position to take here.
Nutritional science has not the predictive power to discuss things mechanistically. It has barely the statistical power to get over the predictive power threshold of specific questions with direct evidence.
Ignoring ALA? Are you sure about that? Based on what evidence?
@@ravecsucks6192what’s the study that you’re referring to?
I have just encountered your channel. It is wonderful to see that some people still look at the science. Bravo!
Absolutely love all of your videos. I have been learning SO much. Keep it up!!
Hi Gil,
How does this fit in to the argument of high O6:O3 ratio negatively impacting cardiovascular health or even atherogenic?
I appreciate the work that you put out specifically because you present the information in a non judgemental and open minded way. Not many people do that. Too many people treat the spread of misinformation as a product of stupidity but i dont think thats the case most of the time. Seems to me it's a product of mistrust and overcorrection from disillusionment. Thank you very much for the work you do.
More likely, it's because people want to believe their own narratives and resist anything that disproves that. It's human nature, really, and a defense mechanism to resist taking responsibility for our own poor choices.
Are there other inflammation markers apart from crp? Could there still be inflammation with no elevated crp?.
What an underrated channel. Gil is solely evidence that ordinary people cannot digest good quality content. :)
The amount of meticulous research you put into these videos is really incredible! As far as I know the most valuable channel on nutrition at the moment. Also love that you always take time to explain scientific processes, and how they should be interpreted. Your work is much appreciated! :-)
I read malicious instead of meticious and i was about tho write a trantrum hahahaha
Im not convinced tests for inflammation are to be trusted. I was told by a doctor l had no inflammation markers,but my knees were burning with pain. Somethings amiss .
I agree. I invested in Biotech companies and had to read a lot of papers very fast and to evaluate it. But Gil really does a big effort to present the scientific data from different perspectives.
So before anybody start to criticize Gil, he/she should ask him/herself, if he/she did the 1/10 of the work done here. I hadn't, so I a happy with the results.
I wish that there would be so many studies out there about infectious transmission. I fear, in the next pandemia we don't know what to do exactly and what not like in the past 3 years.
Would love a video on the effect on weight gain or loss due to the high energy density of fats (from oils especially) and how it can impact cardiovascular disease (blood pressure, ApoB, etc). Thank you for your cogent and easy to follow lectures.
That is the crux of the problem. People don't like to face the reality of calories in/calories out. It's too frustrating and difficult for many people who struggle with weight issues.
Years ago, one of my doctors suggested that I should gain some weight. I heard that olive oil was benficial to health, so I started to pour it on my food like syrup on pancakes. I did gain more weight than ever before, but all around my belly. I knew that wasn't healthy, so I stopped doing that and lost the belly.
@@someguy2135 You probably already know this, but what areas you gain weight mainly comes down to genetics (assuming your hormone levels are healthy) and not the types of food you eat.
@@someguy2135 Did you have your cortisol levels tested when you had the belly fat? Wondering if it went up.
@@someguy2135instead you should have started eating more protein rich foods like legumes, nuts and seeds and startet resistance and weight training. Muscles would grow you get the extra weight and maybe even looked better. Just saying
Thank you Gil! Another great video giving clarity!
Thank you so much for reviewing all these studies! As a researcher, I would like to point out that the sample sizes in most of these studies were very small to make generalized recommendations to the entire population.
They may have been small, but they were also consistently repeated in different demographic groups. That's a more significant point that lends validity to the conclusion that seed oils are at worst benign to the majority of the population but can also be protective. It's only under extreme conditions, like repeated high heat frying which causes damage to the oils that we really have to be careful with use. So if you want some fried food, make it at home!
Thank you for addressing seed oils and inflammation. It would be great if you’d continue in this vein. I’m particularly interested in the effects of seed oils regarding cholesterol and heart disease, and also their potential effects upon the development of dementia and Alzheimer’s.
100%. Came here to say this. Thank you.
There's very little research on this. Though some experts speculate that omega 6 fatty acids interact with cholesterol and oxidize it, which is bad.
@@Trazynn There is actually massive amounts of rechearch on this, and it all points to the direction that replacing saturated fats with omega 6 LA is always beneficial considering cardiovascular diseases.
@@Trazynn Isn't there a connection between oxidation and inflammation?
@@Nobody-Nowhere I believe that the Sat fats -> PUFA substitution only tends to have a statistically significant positive effect on blood markers for people consuming >10% of their daily calories from saturated fats. If you are already eating them in moderation then replacing them with PUFA sources won't help or hurt you
In the course of your research, did you find any data on Avocado Oil? This is often referred to as a high temperature oil, and given the nature of fats in Avocados, I am curious how the oil compares to these other types in terms of inflammation markers and Omega-3/6 balance.
I’d like to know too. The avocado oil I have bought smokes pretty easy at medium heat, which it’s not supposed too.
I think from the video no oils appear inflammatory.
Thanks so much, I have discovered you recently, what a pleasure to listen to you, you are a great communicator and professor, more importantly you know how to read and analyze research papers. you really give the "bird's eye view" of the matter, so talented you are, glad to have discovered your channel and I am getting great education.
Thanks so much!!! I feel like I"m on my own to try to figure out why my pre-diabetic numbers are not responding to the typical regimen of low carb despite returning to normal BMI and exercising etc. So I"m looking at inflammation and there is so much conflicting info. Your time and attention to peer-reviewed evidence and explanation is GREATLY appreciated. One you tube video called all seed oils "evil".
I am a university college teacher in Australia and consistently seek out current evidence in a range of health areas to ensure I am relaying the best information I can to students. I found this thoroughly educational and loved how you managed to pre-empt my questions and have them all answered by the end. This definitely threw a few of MY beliefs out the window. Thank you for putting in all this work. I completely understand and appreciate the efforts you went through in order to make this video. You have a new subscriber. 🙂
Update: This is not to say I have thrown all of my own beliefs and knowledge out the window. I just appreciate opposing views and the literature that might back them. There is also evidence out there supporting the risks of vegetable oils, showing we can find papers that support both narratives. I personally will be steering clear of vegetable oils wherever possible.
Is damage to mitochondria related only to inflamation -- or -- does rape seed relate to mitichondrial damage through means other than inflamation?
You can also find data supporting smoking, that's why we have the heirarchy of evidence.
The man made his video from the top of the heirarchy, to reply to that with "well I can cherry pick and reach a different conclusion for myself" ... can you seriously defend that behavior logically?
Not if it’s virgin, cold pressed.
While I can understand your "views" (opinion), scientific knowledge should not be based on opinions ;-))
@@StillTrustNo1Thank you. People are so lost and straight gullible. Dying for someone to think for them
Brilliant video! Learnt everything i needed to. The only reason i do not consume seed oils is because i find it affects my cardiovascular performance negatively and i gain unnecessary weight as well, i become more suscepitable to insulin resistance which does me no good in terms of training.
Knowing that the bulk of studies point to seed oils not having an inflammatory effect on the body in human trials is very important information so thank you for doing such a noble service in pointing that out against the controversies.
Well done, and thank you for tackling this topic. Another sensational video, Gil.
This channel is a gold mine. Subscribed! ❤
Wow this must have taken alot of time, well done. I'm kind of dissapointed that so few studies specified whether the oil was refined or not, and that there wasnt many comparing seeds to refined seed oils. I think thats where the interesting part lies. I'm worried that most of the positive molecules you would find in these seeds are lost during the refining process, and removing them from their protective shell exposes them to oxidation. Really hope you are going to make all those other videos you mentioned. Oxidation, cancer, and heart disease (that one is definitely contentious). If you're not already knee deep in the research, Martin Grootveldt has some really interesting research on frying with PUFA rich oils.
Great job Doctor. You are
worth your weight in gold!
A godsend for us fact seekers. Keep up the great work. Brian Z.
Great video! As usual. 😊 Please continue to do videos on seed oils and other oils for health effects other than inflammation. It’s one of the few foods almost all of us consume. I am learning a lot about nutrition and I have to say oils are one of the few areas where I am totally confused whether it is good for me or not.
Thanks for taking the time to do this .
This guy presents the most thorough and scientifically based nutrition advice I've seen. Thanks Dr. Carvalho!
Pharmacist with a masters in clinical nutrition here, you put out absolutely amazing content!
thank you sir!
I've definitely been following the anti-seed oil bandwagon. Thanks for putting this episode together and giving me perspective.
agreed, this was very well organized, and it's good he mentioned the longer-term studies, since some arguments against seed oils have suggested 8-12 week trials are not sufficient for any effects to measurably manifest. i avoid seed oils as a precautionary method (and also because they have no flavor) because omega-6 was not consumed in high concentrations in our ancestral environments--though the end of the video argues it's plausible our bodies nevertheless have a mechanism to maintain homeostatis with respect to the concentrations of resulting metabolites.
Thank you so much for this video!! I have been wanting to genuinely learn if seed oils is something that I should restrict and the conversation around it is SO heated I had idea who to trust! This is exactly what I needed
Thank you for looking at ALL the studies and providing a synopsis for the general public.
I wanted to add some info about heated fryer oils in the food industry based on my experience. When I was young I was a manager at a medium-sized fast food chain. We would fill the fryers with oil, and they would run at ~375F all day long, and we would change the oil every 2-3 days on average. I was later a manager at a grocery store with a hot food department, and had a similar experience - although we used the fryer less there so we only changed the oil on a weekly basis for the most part. Essentially, the more you fry, the quicker the oil starts to get filled with burnt sediment from the food. You can skim a lot of it out, but many particles are too small for the skimmer I guess, and eventually your oil begins to appear dark/dirty and can begin to affect the taste of the product, so you have to change it. I imagine at very well-run fast food franchises they have some very specific protocols, but where I worked, oil changes were based on a subjective assessment of the oil.
I've been in the industry myself, and I agree. I just wonder if the issue with inflammation isn't actually so much the oil, but the typical flour based batters that remain in the oil. With them being skimmed and broken down into such a small pieces maybe they uptake quicker into your system and that is where the inflammation is coming from. I don't know, I'm just a student of TH-cam U😄
@@cincin4515 A deep fryer being emptied after every use is comically ridiculous as an idea.
@@timtinsley1800 I am also wondering about how the oil changes chemically every time it is heated. There must be some kind of chemical breakdown/reaction that occurs each time the oil is heated. Are there any studies on that?
No protocols or ethics period
some just replace the oil as its used up. never actually replacing it completely.
What do you replace oil with for cooking/frying?
In the Netherlands, where I come from, people generally use butter for meat and water for vegetables. In China, where I live since 2011, most foods are prepared with oils.
At our home, we often melt the oil out of pork fat and we use flax seed oil. Would ghee or anything else be a better alternative?
Thank you so much for making this! I know SO many people who should watch this
Quality content! You are so wonderful for devoting your time and smarts for the benefit of humanity.
Thank you very much for the content. Could you please consider uploading a similar video on animal fats like lard, butter, etc.? What happens when someone cooks with these fats and keeps their corresponding calorie intake below the maximum advised level (10%), especially concerning inflammation or other long-term health issues? I have found papers on negative effects of those fats but they show high levels of consumption and, of course, there are other variables that make it confusing for someone without expertise. I would immensely appreciate your insights. Best wishes for you and the rest of the team.
You would need a study on long term consumption, which would be hard to do.
@@Marr033No they do not.
I'm wondering how these oils are being consumed.. with high heat or just put onto foods? Also what is their sugar and refined carb intake during those trails? I think nutrition is so complex and there are so many factors to look at
Excellent video. Thank you for the work you put into this!
💪Brilliant review of the research & really clear explanations. Thanku so much, Gil.
Thank the gods for your science first approach. I'm fed up of hearing self-proclaimed gurus of health pontificate about subjects they make up or repeat from other gurus. Your presentation is refreshing. Thank you.
Exceptional summary on these trials-one caveat, one could also hypothesize that the inflammatory markers used are not specific enough to the target organ which is usually the endothelium to identify a response one way or the other. For instance, hsCRP comes predominantly from the liver in response to cytokines secreted by the target process so is an indirect measure (but an acute phase reactant). Inflammatory markers like CTACK, MCP, HGF, Eotaxin, FAS, FAS-Ligand, and IL-16 might be more appropriate as being more direct and sensitive. Still a great overview-thanks.
Yes, he’s a great researcher and presenter, but you have also given excellent evidence as to why I am more interested in feedback from practicing clinical doctors and patients. Research tends to limit material to predetermined outcomes as there is too much money at stake.
Very interesting point! Great!
This is excellent Gil, thanks very much. Appreciate the thorough investigation here
Amazing analysis. You are a kindred spirit. When I start deep diving into things I normally tend to approach this way. Look for things which are both pro and con result studies
Excellent video. Straight to the point, no BS, and with the right amount of detail to not leave any hanging question.
Can you tackle next th relationship between seed oils and the brain / dementia? Thanks
Fabulous episode. I wish there was some good information on cancer in relationship to seed oils . I have always heard that seed oils , especially when over cooked, are carcinogenic. In general, are there any other ways in which seed oils might be harmful?
Anything "overcooked"....read burned.... can be carvinogenic
Loved your take on this heated topic. Curious if these studies distinguish between Expeller Pressed and Solvent Based oils?
Superb presentation on a very important topic. Thank you for all of your hard work!
I would be curious for a video on high protein diets on (long term) health. Thanks, I learned so much again.
I appreciate the unbiased, logical way you address these health/nutrition issues. Thanks!
I can’t tell you how grateful I am for your thorough, science-based approach. Thank you.
Wow that just cleared up a ton of confusion for me. Thank you so much Gil!
Instead of inflammatory markers, I'd like to see studies that test effects of these oils on cardio-vascular health.
hi, we covered that here: th-cam.com/video/_VwDZVbfrKo/w-d-xo.html
Excellent structured review. Brilliant explanation.
Really appreciate the time taken to review the studies that respond to so many of the questions over diet and nutrition in current circulation.
So what is going on specifically with highly processed foods using refined ingredients (refined vegetable oils, refined grain flours, refined sugars) that appears to be correlated with declining health and markers, almost in direct proportion with increased consumption levels over the decades?
If it's not the refined carbs (sugar, grain flour), and it's not the refined oils, whether used for cooking or consumed directly, what is the cause? Is it a simple issue of consumption levels in terms of overall caloric intake and subsequent weight gain over time, as it is easier to over consume processed foods made with refined ingredients?
Isn't this connection between seed oils and inflammation a red herring? Should we not focus on impact of seed oils on heart health?
200%
yet this is the question everyone asks... so I guess it behooves us to answer it
Do the studies say anything about the source of the oils? For example - brand, organic, GMO, cold-pressed, method of extraction, etc? Could those details cause a significant variance in results that were obtained in people?
Thanks so much for your hard work. You cleared things up for me.
This was a huge eye-opener....THANKS !!!
IMO "seed oils" is simply a proxy for diet quality. If your diet ais high in seed oils it means you probably eat a lot of snack foods like chips, crackers, cookies and fast food. Not great if you are concerned with your health.
so true
You have not seen my combination of spaghetti olive oil and garlic 😁 I definitly exceed the 500kcal from oil in these days with any junk
good point. also follow the money. large billion dollar industries pumping out processed foods and they all use seed oils because they are cheap and stable. Big red flag
@@YaYippieYeah
LOL are you Italian or Greek? I’m sure if you don’t eat daily and it’s cold pressed your fine. And sounds good. 😉
Agree. I think culture also plays a role incl Indian, Italian and Greek. If fresh real/whole food used with the higher levels of oil can be healthy.