Why the Body Set Weight changes EVERYTHING about weight loss| Jason Fung 

Check out my video "Can Fasting reverse Kidney Disease?" - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SI_c16-_dqw.html

Thank you for making these videos and NOT charging for the info Dr. Fung!

Hi Dr. Fung, I followed your advice about intermittent fasting. I lost 15 pounds in 3 months. My A1C from 6.3 to 5.8. I appreciate your time and effort to make these videos on RU-vid ! Thank you for your help 🎉

Any treatment for obesity that doesn't treat the body fat thermostat is doomed to fail over the long term.

Good reminder Dr. Fung. I got my fasting groove back. I have reestblished a 36 hour fast today. Today as I was feeling hunger I thought of you and reminded myself that this is just my ghrelin getting turned up.

The great thing about fasting is it actually increases the metabolism when you do fasts 96h and under. It also regenerates organs like the thyroid at the end of the fast due to growth hormone generation. Hormons like testosterone slowly wane with age but in both men and women, growth hormone reduces by 2/3 as soon as we are adults and stays that way forever for most people. The many benefits of occasional extended fasting and lowering dietary carbs: Your body recycles up to 1/3 of all immune cells in a 72h fast, rejuvenating your immune system. This helps with autoimmune disease, cancers and cytokine storm. Reduces B cells by over half in a single fast, greatly reducing allergic and other autoimmune responses. Fasting and low carb help with POTS, which is driven by high insulin and blood sugar. Fasting reduces cortisol over time and improves your circadian rhythm. Fibrosis aka scarring is reversed over time, including in the heart, lungs and clots. Clotting and fibrin are inhibited, stopping any 'unusual' clots. Fasting stimulates phagocytosis, the ingestion of proteins, pathogens and plaques by macrophages and other immune bodies. This will remove spikes quicker, whether natural or unnatural in origin! Fasting restores NAD+, reduces NADH and increases nitric oxide release to open blood vessels. Reflexes and short term memory are increased. Fasts from 36-96 h increase metabolic rate due to norepinephrine release!. Blood sugar and insulin are lowered when fasting, reducing inflammation and allowing the immune bodies to move freely through the body. T cells are cruciall in fighting cancer, autoimmune disease and infection. With age, the thymus generally stops making them but fasting releases stem cells, which then can become new T cells. It also releases growth hormone, which regenerates the thymus! When insulin is high, vit D stays locked in the blood cells but fasting quickly lowers it. Vitamin D plasma levels are increased as fasting improves metabolic health, and D in turn increases autophagy. Fasting increases anti-aging Yamanaka factors and increases average telomere length in stem cell pools. Fasting increases interferon, which shuts down the ability of viruses to replicate. Clots and plaques are removed over time due to accelerated phagocytosis. The hunger hormone ghrelin also lowers with extended fasting and rises from dieting. Fasting does not reduce testosterone over time. Iraises it when the fast is broken by increasing lutenizing hormone. Fasting also increases insulin sensitivity, which helps with muscle building. And removes fat, which also increases estrogen in men. Fasting activates autophagy (literally self eating). This recycles damaged proteins and foreign matter such as viruses. Fasting can help with MS, Depression, BPD, Autism and seizures. Weight loss from daily caloric restriction has 1/4 to 1/3 of the weight lost as lean tissue while many studies show fat loss from 36 h fasts without losing any lean tissue! The obese will lose loose skin while fasting, but the frail will have increased growth hormone release, which helps to make more lean tissue and reduce frailness. It increases mitochondrial function and repairs mtDNA. Mitochondrial function also has the added benefit of increasing your metabolism, fighting infection and cancer prevention! 24h of fasting reduces leptin levels by half! This reduces leptin resistance, which impairs immune function. Over time fasting normalizes stomach acid levels and during the fast acid levels go down to allow for the healing of ulcers. Fasting reduces pain and anxiety by stimulating the endocannabinoid system, just like the effect of CBD oil Your brain prefers to burn ketones at a rate of around 2.5 to 1 when equally available to glucose. Except for brief periods of very intense exercise, your body mainly burns free fatty acids. When not in ketosis, the brain can only burn glucose, which produces a great deal of damaging ROS the brain has to deal with. Fasts of 36-96 will not affect short term female fertility or affect menstrual cycle. They also may increase long term fertility for some women. Fasting releases BDNF and NGF in the blood, creating new nerve and brain cell growth. This helps a great deal with diseases like MS, peripheral neuropathy and Alzheimers. Fasting stimulates apoptosis in senescent or genetically damaged cells, destroying them. Senescent cells are responsible for many of the effects of aging and are a root cause of the development of cancer. Glycine and trimethylglycine (TMG) can also be useful supplements while fasting that won't break ketosis and have many benefits. A fasting mimicking diet for 3-5 days in a row provides many of the same benefits as water fasting. FMD has about 200-800 calories, under 18 g of protein and zero net carbs. What breaks a fast? Anything with protein or carbohydrates in it will break a fast but most teas and herbs are OK. Supplements and meds usually break ketosis directly or contain a filler that wil, or irritate the stomachl. Many meds are dangerous to take while fasting. Exogenous ketones can aid with fasting, allowing some people with specific issues to fast in spite of them without worrying as much about hypoglycemia. They also help with dementia and many other issues even if you take them while not fasting! Children, expecting or nursing women should not fast for periods longer than 16 hours. People with pancreatic tumors that excrete insulin or certain rare forms of hypoglycemia generally cannot fast at all or only with doctor supervision. T1 diabetics can also fast but it is more complicated and should be approached with caution as it could lead to ketoacidosis and done under doctor supervision. If you experience extreme symptoms of some kind, especially dizziness or tremors, then simply break the fast with a low carb meal. Resources: www.nia.nih.gov/news/research-intermittent-fasting-shows-health-benefits pubmed.ncbi.nlm.nih.gov/31890243/ www.sciencedirect.com/science/article/pii/S0005272806000223 www.ncbi.nlm.nih.gov/pubmed/23876457 www.sciencedirect.com/science/article/pii/S1931312809002832 www.ncbi.nlm.nih.gov/pubmed/10859646 www.ncbi.nlm.nih.gov/pmc/articles/PMC7093158/ www.nejm.org/doi/full/10.1056/NEJMc2001176 www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.121.17852 www.clinicaltrials.gov/ct2/show/NCT04375657 pubmed.ncbi.nlm.nih.gov/20102774/ www.ncbi.nlm.nih.gov/pmc/articles/PMC6141719/ www.arcjournals.org/pdfs/ijrsb/v3-i11/7.pdf pubmed.ncbi.nlm.nih.gov/27569118/ pubmed.ncbi.nlm.nih.gov/23408502/ faseb.onlinelibrary.wiley.com/doi/abs/10.1096/fasebj.2019.33.1_supplement.819.10 www.ncbi.nlm.nih.gov/pmc/articles/PMC3017674/ www.ncbi.nlm.nih.gov/pmc/articles/PMC5895342/ www.cell.com/cell-metabolism/abstract/S1550-4131(15)00224-7 repository.upenn.edu/cgi/viewcontent.cgi?article=1537&context=edissertations www.ncbi.nlm.nih.gov/pmc/articles/PMC1779438/ www.ncbi.nlm.nih.gov/pmc/articles/PMC6526871/ pubmed.ncbi.nlm.nih.gov/23707514/ pubmed.ncbi.nlm.nih.gov/20921964/ www.ncbi.nlm.nih.gov/pmc/articles/PMC6407435/ www.cell.com/molecular-cell/fulltext/S1097-2765(18)30605-1?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS1097276518306051%3Fshowall%3Dtrue pubmed.ncbi.nlm.nih.gov/28235195/ www.ncbi.nlm.nih.gov/pmc/articles/PMC2815756/ medicalxpress.com/news/2022-10-treatment-pulmonary-fibrosis-focus-telomeres.html www.cell.com/cell/fulltext/S0092-8674(19)30849-9 clinical.diabetesjournals.org/content/36/3/217 www.ncbi.nlm.nih.gov/pubmed/25686106 onlinelibrary.wiley.com/doi/full/10.1111/j.1365-2265.2005.02288.x academic.oup.com/ajcn/article/81/1/69/4607679 www.amjmedsci.org/article/S0002-9629%2815%2900027-0/fulltext www.collective-evolution.com/2017/05/16/study-shows-how-fasting-for-3-days-can-regenerate-your-entire-immune-system/ pubmed.ncbi.nlm.nih.gov/7714088/ www.nejm.org/doi/full/10.1056/NEJMoa012908 pubmed.ncbi.nlm.nih.gov/15522942/ www.ncbi.nlm.nih.gov/pmc/articles/PMC7607739/ pubmed.ncbi.nlm.nih.gov/31877297/ www.ncbi.nlm.nih.gov/gene/25712 pubmed.ncbi.nlm.nih.gov/33530881/ www.biorxiv.org/node/93305.full www.health.harvard.edu/heart-health/abundance-of-fructose-not-good-for-the-liver-heart pubmed.ncbi.nlm.nih.gov/25909219/ www.ncbi.nlm.nih.gov/pmc/articles/PMC5783752/ www.ncbi.nlm.nih.gov/pmc/articles/PMC1413655/ www.ncbi.nlm.nih.gov/pmc/articles/PMC5783752/www.ncbi.nlm.nih.gov/pmc/articles/PMC8470960/ europepmc.org/article/MED/22402737?javascript_support=no pubmed.ncbi.nlm.nih.gov/2518860/ www.ncbi.nlm.nih.gov/pubmed/24905167 pubmed.ncbi.nlm.nih.gov/29727683/ n.neurology.org/content/88/16_Supplement/P3.090 pubmed.ncbi.nlm.nih.gov/6859089/ www.ncbi.nlm.nih.gov/pubmed/10232622 pubmed.ncbi.nlm.nih.gov/21410865/ This list compiled over years of research by the user known as Pottenger's Human on youtube. Feel free to copy and paste this anywhere you like, no accreditation needed!

Thank you Doctor. You are a saviour. A1c from 9.6 to 5.2 in 3 months. Weight loss 12% Intermittent fasting 12hrs a day Carb moderation walking / cycling 3 times a week

Post menopausal, Intermittent faster here, now for 28 months. I lost 19% of my body weight in the first six months however my set point wanted me to weigh slightly more and I now accept that my body is happier at a slightly higher weight. I’m at goal and weigh about 16% less from the time I started intermittent fasting. I’m down three pants sizes and I take my body measurements once a month. Thank you for your channel Dr. Fung intermittent fasting actually is pretty easy to do. I think of it as a light switch, on or off, eating not eating.

🎉 I get too excited when I get a notification of a new video of yours.

Thank you Dr. Fung. Your analogies are so helpful.

If anyone is interested or needs more motivation: l was a fat, sick, very old-looking woman in Feb 2023 with a BMI of 34.5 (dangerously obese for my height), now I am getting IDd at bars again :D I shed 76lbs in 6 months last year using fasting (between 24-76 hours most days of every week for the whole 6 months) and intense endurance exercise. I went from an XL to an XS :) All the obesity-related health-issues I was enduring had a total reversal. My skin shrank to the extent I am _constantly_ accused of surgery from randoms who see my transformation on the internet (it’s all documented). I also built muscle, fitness, and endurance from the bodyweight HIIT exercises and walking I was doing! At almost 36 years old I am now getting ID’d again 😊 (Also I’m a mother of two teenagers! My belly looks like I haven’t had babies or ever been obese) Anyway part of what I’m here to say is that most days I drank strong dark coffee (the plunger kind), with cream in during my fasts :o usually just one big cup with a splash of cream. So this confirms what Dr Fung has said in other videos that cream may not have a negative affect on autophagy ^_^ (though it may depend on the individual! I’m talking real cream from a cow, not artificial creamer) Also it’s been a year since I shed the weight and have effortlessly maintained - my “set point” seems to be somewhere between 116-120lbs now?? I’m 5’2”, I eat OMAD as a lifestyle, and also do carnivore a lot of the time. I do running for exercise. I’d prefer walking but I’m often busy so I get the exercise done faster if I run. Also I did all this in poverty!! People have told me I’m lying because I’d have to be rich for all the surgeries I’ve had 😅 But my front tooth is broken and badly coffee stained because I can’t even afford a dentist lol (not begging here, I don’t accept money or donations, I’m just trying to emphasise what’s possible even with no resources!! Hopefully this can help give you hope and motivation if you see it :D

Hi Dr Fung! Thanks for posting this video. Really important information for weight loss and maintaining weight loss. I'm 61 and lost 160 lbs by finding and following your videos, interviews, lectures and books. It reversed ALL my health issues. I'm maintaining well but I found it challenging to learn how to maintain once I met my goal weight. Maybe a video about maintenance? I feel the best I ever have and I'm loving my fasting lifestyle! Thank you so much for all you do for us! 🙏😀💪

Dr Fung is a brilliant doctor and has helped so many people. Keep doing what you're doing, doctor. Much respect.

2 things adjust the body thermostat aside from excersising. 1 intermittent fasting. 2 adjusting the kinds of foods you eat and ratios. This means ditching seeds oil, minimizing carbs as much as you need on a individual basis, upping protein. If that isn't enough, up fat intake with healthy fats like animal fats, butter, ghee, olive oil or alvacado oil as long as not heated, coconut oil, sesame oil. Nuts, seeds, alvacado, olives, cocoa nibs, cheese, eggs, fatty meats as well as lean meats, are all good fats to have. Focusing on mostly whole foods helps too. Adding in fermented foods helps reset things. These are the best ways to reset metabolism. Not saying everyone has to even eat a ketogenic or carnivore diet though I did for almost 2 years. But some form of low carb, primarily whole foods, seed oil free, antiinflammatory diet does the trick. That can be keto, ketovore, carnivore, Paleo, Mediterranean, or any form of low carb you create individually. I'm doing my own version of low fodmap general low carb no real guidelines but below 100 g carbs a day, usually between 60-70 g total but under 50 g net currently. Some people do well on less, some on more. Hense my individual needs comments.

Thank you for your informative videos. I fast 16/8 . To date I lost 25 pounds. I have another 10 pounds to go.

Thank you for all your videos. I follow the intermitting fasting and i feel so much better with my weight loss. Your advise has probably extended my life.

Dr. Fung makes everything understandable and I really enjoy his info. Gotta get the book The Obesity Code!!! Thank you.

You’re the best teacher and a phenomenal doctor!

Another great video from the GOAT Dr J Fung!

I sort of knew rbis but not really understood it til this video. Thank you, explains a lot.

Whoah..amazing content. This explains a lot..i am grateful for this channel Dr. Fung!

Back in 2018, I read The Obesity Code as I started my Keto journey. I have referred many people to it because of the information on body set weight. For those wondering the how to reset your body set weight, you should read Dr. Fung's book. He also talks about it on previous videos. I'll give you a hint. It involves intermittent fasting. 😊

Thanks, Dr. Fung! Please focus on the HOW next time :)

Many thanks for all your hard work Dr. Fung. I've learned alot and improved my health substantially since coming across your books and RU-vid channel.

Thank you.

Thank you Dr. Fung! You saved my life

Can’t wait to hear the HOW now !!!!

Great video Jason, thank you. 👍

It still a pleasure to listen to Dr Fung 💙💙

Awesome!

I will keep my eyes open for part 2

Thanks.

Thank you!

Sure look forward to learning how to reserve my fat thermostat. Thank you.

Thanks. Enjoyed that.

Thank you for these videos and helping people. What I noticed about this topic of the thermostat is it reminds me of a concept about becomming comfortable in a certain body condition. So in your example about hormones where it involves the nervous system, it reminds me about how when your body physically doesn't have a cerain range of motion is that you gradually train/adjust your body top get used to that range of motion and that becomes your new normal ROM. With that in mind, it seems like it is all about getting your body to be in a non-stressed state, physically and hormonally toward the condition you want your body to be in.

Can't wait to hear more about how to change our set weight. Great topic!

Thank you

For anyone searching: This is not a video on HOW to recallibrate your set point

Dr. Fung, I am new to your work. I would ask that as you continue on this excellent topic, please make clear when you "adjust the thermasat" what does increasing/ deacreaing the thermostat mean? Is it increasing/ decreasing weight, respectively? Great job teasing this topic!

Thank you🌷🌷🌷

People can say whatever they want. I water fasted for 92 days and cured my stage four cancer. Not only that but I lost a ton of weight with no loose skin. Got off ALL my medication and look younger than I am by 20 years. It works. I was morbidly obese. I’m still fat but I’m not dying and continue to lose through OMAD and keto diet

Ok! VERY helpful

Fasting is the ultimate tool for hormonal control for the body fat thermostat. Brilliant video, Dr. Fung!

Hello Dr. Fung. ❤

Very interesting. I'm looking forrward to your follow up video about the specific hormones that affect one's body fat thermostat. Some years ago, I was excercising heavily, lots of cardio, spinning classes, etc. Hardly lost weight, and what I did lose I gained right back. I know now that what I was eating was just as critical as how much. I never had a fasting insulin test then, but I'm sure it would have been high as I was not only under a lot of stress, I was eating proabalby 3500-4000 calories a day of high carb foods.

It would have been useful to go into more detail with regard to how to reduce your body's thermostat. I've lost a lot of weight, I read The Obesity Code but for others who haven't, going into some detail on that would have been beneficial. There is a prior video by Dr Fung, "weight loss (controlling body set weight)" from couple of years ago. That video has more of an explanation as to how to reduce your body's thermostat, for anyone wanting that information go watch that video. I can't provide a link to it but it's about 3 years old of years old from 2021 and you can find it under his channel. That video has a link from Dr Fung to another video of his that helps with losing weight. It's listed in the first comment to that video. I hope this information is helpful for someone.

Hi Dr. Fung. How do we change our internal thermostat? I need to lose 50 pounds. Will intermittent fasting help change the internal thermostat? I was thinking of doing a 3 day water fast and then immediately starting a 16:8 intermittent fasting schedule. Will this lower my internal thermostat?

Good to know but you didn't tell us HOW to adjust it.

Dr. Fung- will you please do a video on the impacts of fasting for certain lengths of time and how it impacts the metabolism. Ex. The impact of a 24-36 hour fast vs a 10-12 hour fast and how it impacts over time.

Apologies in advance for nitpicking the analogy, but you can't move cold into a room; you can only remove heat. Just like you can't apply darkness to a room; you can only turn off the lights. This just rubs wrong people with an understanding of thermodynamics.

It hit me in 2023. At some point, after great success with keto, I still gained weight again. Now I walk for 60 minutes a day with a weighted vest so that my body thinks I'm already 20kg heavier. Since then I've been less hungry and lost weight again. Unfortunately, I can't judge whether it's the more difficult sport or the more weight on the bones.

Good video. Just a note for the editor, at the end youtube pops up an overlay for another video of the channel but it blocks his face. You might center the doctor during the outro part of the video so it's in the middle so we his face clearly.

Great info Thank you When will your new clinic in Toronto open and is there a link you can share?

Can u please tell us what the best artificial sweetener to use?

So can a One meal a day ketogenic diet, along with exercise can decrease the levels of the body fat thermostat? A lot of will power is required

Dr. Fung…… what a tease you are!!!! Now I’m gonna get this book finally so I can understand how to lower my set point!! I’m on OMAD at only30 grams of carbs trying to lower my A1C and loose weight. You’re amazing and my great health today is due to your videos….. you help thousands and thousands of people! What a soul you are! ❤

I hope you can do a video on getting into ketosis. Some say 18 hours others say 2 days. Also how it varies individually. So more info regatding this would be nice.

So, how to you control the thermostat?

This makes sense! Need more info on how to adjust that thermostat.

How heritable is the body set weight?

Most people I know, including myself, blow that statistic about gaining one pound per year, to bits. When I gain weight, it isn’t a slow process at all and I certainly isn’t just one pound.

Great information!! What fast would you recommend for a menopausal woman ( 49 YO) with hypothyroidism? Before I went into menopause I was always able to keep the weight off with IF … even with hypothyroidism! But struggling to lose weight now I’m in menopause … what should I prioritise … my thyroid or menopause? Is it possible to lose weight with IF anymore?

could you please do a video about lipedema treatment? it is very ugly and painful disease

Yessir! Gotta recomp your set "normal" fat level. Only way to lose fat and keep it off. The general media NEVER mentions this.

Hi Dr. Jason Fung. Thank for your advise i lost 11 kgs in 3 months. Maintaining daily green tea intakes and just eating fruits as part of my diet and at most eggs. After 11 kgs lost from total weight without exercise. I now found out that my weight does not reduce. I need to do some slow steep hill walk daily(500 meter) for a week in order to drop another 1 kg. It seems that the fasting works for the first 11 kgs but to loose more kgs you need to exercise and fasting does not work.

I don't think it's mainly about insulin because I lost weight with surgery and followed a carnivore diet for two years, but then I almost gained it all back. Now I'm on Ozempic, and I feel like the only real solution might be to stay on Ozempic for the rest of my life.

Question with GLP-1's. If you intermittent fast and eat low carb/keto while you are using them, are you still lowering your body thermostat?

Dr. Fung, i must stay that your thumbnail game is getting strong. Mr. beast is taking notes...lol

I need to know how to set my thermostat to like 150lbs LOL. Release the knowledge Dr. Fung 🙏🏾!!! Fasting has allowed me to shed weight and clean up my relationship with food like NOTHING ELSE!! I've been obese since I was a child. And to think it was in the bible the whole time!!!!

I will be here waiting for the next part

Let go🎉

I lost 160 pounds naturally through IF, low carb/ whole foods, exercise, stress management, sleep routine... unfortunately, I am slowly regaining weight at about a pound every 6-8 weeks staying strict to the protocol. It's been 3 years in maintenance and I am still slowly regaining (20lbs+) ... not lots of information out there. Approximately, how long does it take for the body to adjust?

An interesting discussion. Lowering the body fat thermostat using hormones like GLP1 explains why hormone mimicking substances like semaglutide (Ozempic, Wegovy) are so effective for weight loss. I’m wondering if losing weight slowly and staying on weight loss plateaus for extended periods may permanently reset the body fat thermostat lower? I’ve lost 30 pounds on Ozempic over 8 months. I want to lose another 15 and am already thinking about maintenance and how to avoid a weight gain rebound. I’ve stayed on a low dosage (1. 0 mg or less) hoping to acclimate my body to anew weight set point and to minimize symptoms of gastric discomfort. I’ve paired this with dedicated strength training, cardio, Pilates and yoga. I’m feeling so much better and really want to sustain this loss. I’m also thinking of tapering the medication very slowly once I’ve achieved my weight loss goal and intermittently cycling semaglutide if I start to put the weight back on. I’m interested in Dr Fung’s ideas about how to permanently reset the body fat thermostat after weight loss.

1 how do we lower our setpoint? 2. Once we've screwed up our matabolism, how to we raise it? .... it's nice talking about prevention. Many of us struggle with the damage done over the years. Now what. Continue eating low calories to maintain a healthy weight? Cycle high low calorie days? I don't think anyone has presented a solid idea yet. Do you have any? Gaining weight is not a good option. Thanks.

Will a Ketotic state reduce the set point?

If I binge on ice cream in a month, I can gain 3-5# of fat, and it does not go away on its own. So is that a hormone problem?

How do you change it?

Where's the best place to start with fasting... I can do 16/8 but my body fat( especially belly, inner thigh fat) stays at 33% ,disappointed. I am 59, post menopausal, I eat clean mostly, no alcohol, exercise of some sort daily. Had bloods done, shows cortisol and insulin are up...any good help I'd appreciate

That was a really awesome explanation, thank you!

If we got a build up of gas if you don’t fart you could blow up..Wow cool. We got a built in valve..

It's difficult to know how to recognise what's going on in order to know how to "turn up the thermostat". I've been IF and carnivore since 25th February 2024 (just over 4 mths). In that time I have cured my T2 diabetes and also lost 3 stone (nearly 20kg) in weight. Except just this last week I have actually put on a pound or 2. I have noticed that I have been feeling more tired and hungrier this week and have been eating sausages where previously they had been excluded from my diet. However, I have also been rather stressed due to the approaching general election (I have been involved). Also when I listed what my typical food intake is on another video, someone commented that I was only eating approximately 1700 calories (I don't count calories so had never figured that out). So am I not eating enough or has the introduction of sausages been a negative or is it just stress and things will settle back down now the election is over? Hormones are SO confusing. Edit to add that it was Jason Fung who I first found to help with my fatty liver and from there started IF. So thanks Dr. F!

Thank you for sharing the obvious with humanity.

I'm a little under 180 pounds at 59. 25 years since diabetes diagnosis. I'm insulin dependent. I've never gone over 200 in my life. My Endocrinologist said my "ideal" weight is 145. He's a skinny guy from Pakistan. I'm not very tall so I know I'm overweight according to the BMI (like half the country) but when I tell others this they think I look "normal" and the doctor is being unrealistic. Is it worth it to try to override what your body's genetics thinks u should weigh? Or r u really just fighting mother nature and your body will not appreciate u starving it to go well below what it thinks it should weigh?

High fat low carb diet to lose weight. Forget fasting.

Dr. Fung all good but you still didn't tell us HOW TO ADJUST BODY FAT THERMOSTAT ?

The availability of junk foods and highly processed foods come to mind as health issues

Okay, but Taubes told us this 20 years ago... did we lose weight bc this info?

Gracias doctor, yo tengo 51 años y por seguir sus consejos he perdido 18 kgs en tres meses, estoy muy agradecido con usted, al pasar de 81 kgs a 63 kg se fueron todos los achaques y malestares propios de la edad. Por lo que le reitero, estoy muy agradecido por sus enseñanzas.

Hi Dr. Fung, I enjoy your clear presentation style and information, but I disagree with the use of Calories as an important factor when talking about human metabolism. The concepts I outline below were presented to me by other RU-vid doctors; please, see if you also agree with them or if you can point out where I went wrong. Thank you in advance. The primary crux of this debate is the Calories (Capital C denotes a kilocalorie) as a model for human metabolism, because as a most know, a Calorie is a unit of heat energy as 4184 joules and measured by burning the food and watching how water temperature increases. That definition and method of measuring a calorie has nothing to do with how our body metabolizes the food or what gets stored as fat and controls our body's composition, etc. Thus the "Calorie In - Calorie Out" model assumes that 3500 Calories is equivalent to 1 pound of body weight. This claim quoted everywhere, but according to researchers that tried to track down in the scientific research it cannot be found... and this fact, if true, is really the key to that model, but on the face of it, relating heat energy to body weight doesn't make any sense. As you pointed out the metabolism research for 100 years has been shown that it is regulated by hormones. Metabolism is based on the citric-acid cycle (Krebs), not by burning, in the literal sense, the food. BTW: Isn't it interesting that fat, which has the highest Calorie density in food, has the lowest impact on insulin? I stopped looking at Calories in food long ago and I look at the macros in grams and the ingredients. I think the Calorie has outlived it's usefulness in informing us of our food choices. Actually just cut out the processed foods will do miracles to improving health. That all said... I do believe that the model for a set-point for fat storage exists and is very real for fat loss. It seems to be sensitive to small variations in the feeding window and foods that raise insulin greatly, like processed foods. I look forward to hearing more about the hormones and how they work in the body. I need some advice to move my "set point".

i need help i lost 5 kgs wid intermittent fasting i gain back 4 kgs how to sustain,,,,plz assist wanna loose 25kgs

Instructions received; carnivore/ketovore(zero or reduced carb) lifestyle + IF for optimized fat temperature. 👍

This Good Doctor Fung deserves the Order Of Canada Award for his service to the country and the planet.

So….how do you reset the fat thermostat? I’ve been alternate day fasting and not losing weight.

I get a lot out of your content but wish you would speak as naturally to the patient audience as you do on podcasts.

🎉

I’m confused with this video. If you eat 500 less calories, your body will shut down and not make energy you need. So if you want to lose weight how do you adjust the “thermostat “ to actually lose weight?

❤

Well, the most important thermostat in the body is supposed to be the thyroid, isn't it? Hyperthyroidism = fast metabolism/lean body. Hypothyroidism = slow metabolism/fat body.

My body gets hot and revs up after every meal but i never lose weight ,took me a whole year to lose 35 pds