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The Benefits of Calorie Restriction for Longevity

Randall Smitham



  1. Mrs. Roper Posted on October 16, 2019 at 12:02 pm

    calorie restriction = the recipe for an ex-vegan.

  2. Peace Love Posted on October 16, 2019 at 12:04 pm

    Lots of people criticize low calorie diets in the vegan community. It's often attributed as to why so many people go back to eating meat.

    'You didn't eat enough calories tho'

    Likely a lot of truth to it. But, for me eating much less calories stopped my life long acne, made me lose weight and I kept it off when I gradually ate more and more. Flattened my stomach and generally felt so much better. Much less nausea and woke up feeling energised. My only concern is getting all my RDA of vitamins..

  3. Pyriphlegeton Posted on October 16, 2019 at 12:04 pm

    Yes! Finally!

  4. urthebest1122 Posted on October 16, 2019 at 12:12 pm

    Stop going to buffets is a good start.

  5. Arthritis to Athlete Posted on October 16, 2019 at 12:12 pm

    Oh Dr. Greger, this was on my list of videos to make, seems like I have an extra source to use in my video now 😏🙏🏼

  6. Sandra E. A Posted on October 16, 2019 at 12:14 pm

    'Until you put it to the test' that gets me everytime😊

  7. FREEBIRD Posted on October 16, 2019 at 12:18 pm

    At last, was wondiring when you will do topic of caloric restriction.

  8. R. C. Posted on October 16, 2019 at 12:18 pm

    fasting is a great way to restrict your calorie,but fasting all the time is unhealthy. The 5-2 day is great,fast for 5 days ( omad,not water fast ) and then 2 days eat normal.

  9. urthebest1122 Posted on October 16, 2019 at 12:19 pm

    It takes some of the constant work off of the digestive system and that energy can be more readily available to assist other organs in the body. That’s why fasting sometimes can heal ailments.

  10. commenter Posted on October 16, 2019 at 12:19 pm

    Why is egg consumption associated with lower risk of cardiovascular disease? https://www.ncbi.nlm.nih.gov/pubmed/29785957

  11. rawbirbella justthat Posted on October 16, 2019 at 12:21 pm

    Amazing news!!! Thank you.

  12. Jorge Castaneda Posted on October 16, 2019 at 12:22 pm

    It’s easy to CR 25% of your daily calories FOR ME.. Eat a large salad bowl with fruit before eating your main entree and the fiber will slow down your overeating. Fast on Tuesday/Thursday and vegan cheat on ONE day of the week . Make sure you eat your beans especially Lentils and Chickpeas for lunch or dinner. So easy and super cheap.
    Another trick (for me)is eating SLOWLY and enjoying every spoon or forkful and let your stomach tell you when you’re done.

  13. Justin F Posted on October 16, 2019 at 12:24 pm

    I just ate an entire cake.

  14. Peter Faber Posted on October 16, 2019 at 12:25 pm

    He complains about keto diets, but he learned a bunch of things from them and is now using it in his videos as a good thing.

  15. Infinite Optimal Posted on October 16, 2019 at 12:32 pm

    We love yoy

  16. Martin Due Posted on October 16, 2019 at 12:32 pm

    This is the hard truth no one wants to hear. myself included…

  17. Deen Truth Posted on October 16, 2019 at 12:36 pm

    So basically, don't do any work. Calories are needed for work. Gotcha!

  18. Purple Carrot Posted on October 16, 2019 at 12:39 pm

    But but .. muh 20 banana smoothies

  19. John James Posted on October 16, 2019 at 12:41 pm

    durianrider is going to jump all over this!

  20. G F Posted on October 16, 2019 at 12:42 pm

    Laboratory animals, starve them every third day, they live twice as long.

  21. Dane Leva Posted on October 16, 2019 at 12:42 pm

    Thanks for the video. Dr Nun Sava Siva Amen Ra is in the process of mastering the caloric restriction, cyclic fasting, anti aging lifestyle, and is writing an evolving encyclopedia on the subject. It seems he's ahead of the game because he's been practicing it for over 20 years.

  22. Chrystal Thornton Posted on October 16, 2019 at 12:56 pm

    Some of us ladies have been on a "diet" almost our entire lives in order to stay slim. Suppose that will extend our lives as you don't see very obese people after middle age.

  23. Renato Мedellin Posted on October 16, 2019 at 1:02 pm

    But aren't vegans supposed to eat as many calories as needed? Isn't restriction on a vegan diet what makes people feel horrible and get deficiencies? Im confused here.

  24. duncan pickett Posted on October 16, 2019 at 1:05 pm

    High volume nutrient foods for the win!

  25. Phil Adams Posted on October 16, 2019 at 1:06 pm

    Can you please respond to Durianrider's arguments against your last video?

  26. Tara Speaks Posted on October 16, 2019 at 1:06 pm

    Sometimes it's just good to listen. I always hear something helpful. Thank you Dr. Greger.

  27. Kenz300 x Posted on October 16, 2019 at 1:13 pm

    Intermittent fasting works – don't eat after dinner and have a late breakfast. 16 / 8 works great.
    It reduces calories by stopping mindless snacking in the evening.

  28. ggzh a Argue With Everyone Posted on October 16, 2019 at 1:21 pm

    Does calorie restriction impair brain function?
    I am worried about that.

  29. Rabbit Food Fitness Posted on October 16, 2019 at 1:24 pm

    Thank you so much for making this video. I have heard about this before, bur have not done much research on it before. Thank you!

  30. Amanda Mate Posted on October 16, 2019 at 1:26 pm

    or for mitochondria power just take PQQ with Q10

  31. Thomas Sudduth Posted on October 16, 2019 at 1:45 pm

    With a WFPD, and eating the DD, I worry not a whit about calories. I’m a lean, mean, walking machine. Walked the 485-mile Colorado Trail this summer, age 72, feeling very fortunate to hang out with the movers and doers of the world, most in their 20s and 30s. As always, thank you Dr. Greger for your information, inspiration, and leadership.

  32. NutritionFacts.org Posted on October 16, 2019 at 1:46 pm

    If you’re watching this the day it comes out, there are two days left to register for my 3rd and final fasting webinar, Fasting and Cancer, at https://nutritionfacts.org/webinar/fasting-cancer.

  33. James Posted on October 16, 2019 at 1:56 pm

    How can I calorie restrict as a bodybuilder :/

  34. Jamie Dunson Posted on October 16, 2019 at 2:08 pm

    Yes, I am finally starting to lose the extra baggage I put on because I stopped listening to those eat over 2000 calories a day folks. No wonder I’ve been struggling. Had to go back to what I already knew.

  35. kindcounselor Posted on October 16, 2019 at 2:18 pm

    I am SO looking forward to Dr. Greger's " How not to Diet" I've been a vegan for three years and I have to admit, the last 10 pounds has been really really difficult for me to shed. Hopefully I get help through his new coming out book. But I also have to admit, I really don't know how to healthfully do this: I am a whole food plant based puritan….still I have those extra 10 pounds. I have recently added a lot of exercise – and I have great hopes that this will help me.

  36. Extraterrestrial Horse From Uranus Posted on October 16, 2019 at 2:23 pm

    I eat ad libitum with whole foods. But i also know what calories look like. So i tend to eat more calories when after workout due to hunger but when im taking a few days off, i tend to eat like half as much.

  37. dejan valjak Posted on October 16, 2019 at 2:34 pm

    You just need to slowly decrease the amount of cal… eating one bite less every single day….the result will come faster then you think…
    Or just try less sugar (maybe 1/6 of a teaspoon) in your coffee every day…
    Huge results after 3 months

  38. Jeromy Layne Posted on October 16, 2019 at 2:41 pm

    Wow this video actually didn't answer any question pertaining to the title. Now we know the people lost weight (got healthier) and that animal studies basically didn't prove anything….

  39. McGee Posted on October 16, 2019 at 2:46 pm

    And here he quite obviously demonstrates what the intermittent fasting Paleo/Keto people have been saying.

  40. JenCataldi Posted on October 16, 2019 at 2:48 pm

    This might be slightly off topic, but I have MS and have found that eating small meals and restricting actually make my feel so much better during the day. I end up being less symptomatic and more energenic. Maybe this had something to do with how the body reacts to calorie restriction.

  41. robertthekingful Posted on October 16, 2019 at 3:14 pm

    This is just false, you want to eat as much food as you can. The more you eat the bigger you get! Not only do you get bigger but your lifespan gets bigger as well

  42. mat mul Posted on October 16, 2019 at 3:25 pm

    The trouble with calorie restriction is that you tend to feel a lot more lethargic. So you may live longer but you won't feel as good. Best not to calorie restrict and do exercise, that way you'll have energy and feel good. Although you may die sooner 🤷‍♂️

  43. Satabra Posted on October 16, 2019 at 3:29 pm

    I just don't feel satisfied and want to eat more when I try to eat less.

  44. Vegan Linked Posted on October 16, 2019 at 3:33 pm

    I love my whole food plant-based diet that is naturally calorically restricting since it's not plagued with animal fat 🙂

  45. i is Posted on October 16, 2019 at 3:45 pm

    I am 31 and I am vegan for almost 11 years. I have tried to gain weight since… ever! So, I always try to eat as much as I can, but I don't have any success in gaining weight. And each time I hear that calorie restriction is beneficial for longevity, I get jealous of all the other girls. Meanwhile, they are jealous of me because I'm a freak of nature who can eat anything, anytime, and a lot.

  46. Vegan Punk Posted on October 16, 2019 at 3:59 pm

    Were the participants eating the standard American diet? If so reduced oxidative stress may just be because of reduced junk food intake. Would love to see a study like this done on wfpb eaters.

  47. Plants Tho Posted on October 16, 2019 at 4:09 pm

    Dr Greger for PUSA '20

  48. Iron Vegan Posted on October 16, 2019 at 4:11 pm

    I have been reading and studying caloric restriction for maximizing my functional longevity for many years, first learning of the concept in a Scientific American article. I do eat much less than I used to when younger, but I do not count calories to reach certain percentages less than a standard caloric load. I enjoy eating, as most humans do, but I do moderate what I eat so that I maintain a healthy bodyfat level and BMI levels. It has become an ingrained lifestyle for me at this point of my life, so I would imagine that I am experiencing some of those positive health and longevity effects that SA magazine mentioned, such as the free radical reduction. Being fully herbivorous for nearly twenty years now has definitely made it easier to maintain a reduction in daily caloric load when compared to my earlier years as a highly carnivorous eater. Thanks for the talk doc!
    calorie restricted but still lovin' eating

  49. Bruce király Posted on October 16, 2019 at 4:20 pm

    Have to eat to get big

  50. truefuschniken Posted on October 16, 2019 at 4:24 pm

    The first time I've been ok with my slow metabolism- lol! Thank you!!!

  51. kannonball Posted on October 16, 2019 at 4:26 pm

    What about fasting, water fasting, and intermittent fasting??

  52. TheRoshan Posted on October 16, 2019 at 4:35 pm

    holy crap this is the golden information we've been waiting for!! can't wait for the IF videos, I know they are coming, I believe with all my vegan heart!!!

  53. Neophyte Posted on October 16, 2019 at 4:45 pm

    I've always wondered whether the calorie restriction = longevity argument is a reason to be cautions with exercising too much, especially since oxidative stress (also caused by exercise) seems to be a causal factor.

  54. Steven L. Posted on October 16, 2019 at 4:49 pm

    I maintain a sub 1,000 calorie diet. I'll let you know how long I live.

  55. Being Your True Self Coaching Posted on October 16, 2019 at 4:57 pm

    I wish I could do this. I know its ridiculous how much I eat. I only eat whole food plant based but can still manage to keep an extra 20-25 lbs of unnecessary weight on me. It might be all the dates with nut butters smeared on them or just the fact that I always have a meal or two a day, in which I get overly full. I guess it food addiction as I had heard that we also produce dopamine from getting a full feeling in the stomach.

  56. Jim Frost Posted on October 16, 2019 at 5:21 pm

    But then you can't be jacked

  57. Lennon Paiva Posted on October 16, 2019 at 5:25 pm

    Benefits of Calorie restriction for longevity can be easily mimicked by reducing inflammatory amino acids (methionine, cystine, etc) or "balancing them out" and by reduced endotoxin level.

  58. 27otherside27 Posted on October 16, 2019 at 5:29 pm

    Hara hachi bu – a saying in Okinawa about leaving the table when your stomach is 80% full. Coincidence?

  59. ParadymShift Posted on October 16, 2019 at 5:38 pm

    Here's my thing: I eat when I'm hungry. Not when I want to eat, not when my stomach is empty, but when I'm hungry. It goes like this: I eat a bunch of calories in the morning, the majority of my day's worth. Then I go to work. I don't stop working (or running errands or what have you) until I feel this driving force in my belly that interrupts my focus and says (via a feeling) something like 'Ooh, hey there man, it's time to eat. Whatever this is, isn't as important as food anymore.' This feeling will naturally go away and fade to comfortability if I allow it, and I can take my fast pretty deeply depending on how excellent my health is at the time or how far I would like to take it. For the sake of normal circumstances, when I feel that compelling sort of gnawing ache in the stomach that drives me to decide to eat, I go ahead and prepare more food. I try not to snack or add calories in between meals in order to cleanse the system and keep it fresh (try it). When I feel tiny hunger urges that aren't very compelling, I acknowledge them and move on. My body will interrupt me if I'm truly hungry for a meal. This is based on synthesis of all information I've come across thusfar, much of it in alignment with yoga/ayurveda.

  60. A3 Skywarrior Posted on October 16, 2019 at 5:40 pm

    I did a 30 day juice feast and after that I never had anymore craving for sweets.

  61. Steph Ss Posted on October 16, 2019 at 6:35 pm

    I'd be interested in how Joaquin Phoenix was able to drop 52lbs for Joker, on a vegan diet.

  62. Jenny Burnett Posted on October 16, 2019 at 6:47 pm

    There's a calories restriction society? People got too much time on their hands.

  63. Scott Gabelman Posted on October 16, 2019 at 7:36 pm

    Fasting is what creates longevity in the body and kills cancer cells the same time not calorie restriction especially for a vegan diet.

  64. LIFESGOOD305 Posted on October 16, 2019 at 7:46 pm

    Sooo anorexics should live forever then, huh?? They calorie restrict to the point they may actually go back in time.

  65. cokefun1996 Posted on October 16, 2019 at 8:07 pm

    Bruh no gains no more?

  66. עירית כץ Posted on October 16, 2019 at 8:11 pm

    Would love to know your opinion on the research:
    Does drinking cow's milk help children grow taller?

    Thank you!

  67. BetterYouBetterWorld V Posted on October 16, 2019 at 8:26 pm

    studies say that the vegan diet is deficient in a handful of nutrients.. im pretty sure thats enough restriction.. if people want to loose weight they should eat more fruit and less of everything else, i was getting thin on a fruitarian diet, now that im eating normal again im putting on some weight, must be the coconuts, love my coconuts, ay fhuuck you main

  68. Jake X Posted on October 16, 2019 at 9:03 pm

    But we’re they healthier just because the food they were eating was unhealthy and so the less the better? What if they were on a near perfect diet vs the same diet but restricted calories? This seems unfinished.

  69. Bill Ding the constructor Posted on October 16, 2019 at 9:05 pm

    Could we restrict calories vis exercise or do we have to restrict through diet only?

  70. moths from neptune Posted on October 16, 2019 at 9:26 pm

    1450 calories a day keeps the doctor away 👌🏻🍏👙

  71. haku Posted on October 16, 2019 at 10:06 pm

    will the fasting webinars be recorded and uploaded here?

  72. Coarsegold Guy Posted on October 16, 2019 at 10:34 pm

    I get smarter every day. Thanks Doc.

  73. Sue Harrison Posted on October 17, 2019 at 2:32 am

    So not being over weight is good for your health but restricting calories when you are slim and healthy is bad. Groundbreaking stuff. 😂

  74. fire7side Posted on October 17, 2019 at 3:41 am

    So, cutting some calories good, cutting too many bad.

  75. Mike Skylark Posted on October 17, 2019 at 2:19 pm


  76. Beatnik Bandit Racing Posted on October 17, 2019 at 2:54 pm

    Snaggy waggy

  77. M Rei Posted on October 17, 2019 at 3:51 pm

    No need to do caloric restriction just so intermittent fasting.

  78. M R King Posted on October 17, 2019 at 4:09 pm

    Dr. Fuhrman's motto for years.

  79. REN Cho Posted on October 17, 2019 at 5:00 pm

    Hello doctor and greetings from Bulgaria
    You are the only doctors I’ve ever trusted and followed. Unfortunately I’m still a vegetarian but a lot less dairy consumption (mainly goat products) and I love the different topics that you present to us.
    But would you please do a video about vaccinations 💉, because I’m so confused with everything around social media these days..
    Please help me with some real evidence for what I should do when I become a mother one day.

    Thanks a lot!

  80. Andrew Carroll Posted on October 17, 2019 at 5:51 pm

    But how many of the benefits of caloric restriction are just due to the benefits of eating less junk? If most of what people eat is bad for them, then it seems that eating less is a good thing. But if you eat nothing but healthy food, would it really be beneficial to restrict calories as opposed to maximizing nutrient intake?

  81. Titan Mellor Posted on October 17, 2019 at 6:49 pm

    Nutrient dense foods and fasting make this easy

  82. Phil Griffiths Posted on October 17, 2019 at 9:03 pm

    Contrary to what this video is telling you… Animals with 17% higher metabolic rates lived 36% longer in the Study 'Uncoupled and Surviving'.

  83. NavyCop0105 Posted on October 17, 2019 at 10:09 pm


    Soooooo today was the day people. Today was the day!!

    6 months I been on keto. Drank wine and had a few cheat days but not many.

    I have lost more than 50lbs. 10 inches off my waist. 2 shirt sizes. Went from 38% to 19% bodyfat and dropping. It's been life changing.

    But everyone talks smack and says wait till you get your bloodwork after eating bacon and eggs for 6 months. I ate other things but that is usually the insult thrown at me by the ignorant.


    Doctor called me today. Had a complete panel done.

    My LDL, cholesterol, HDL, triglycerides, blood pressure, organ function, and vitamin and mineral levels were all excellent not even normal. Excellent.

    She said I could add a little more folic acid to my diet was her only comment. Rest was excellent.

    Loosing 50lbs is 1 thing but the proof for me was going to be what my bloodwork was like 6 months later after eating a high fat high cholesterol diet.

    Ans, excellent. Actually better levels now than when I was a vegan and I am 50lbs lighter as a bonus.

    Now I have the concrete data to show my insides are as healthy as my outside 6 months into keto.

    Life changing back by data.

  84. R M Posted on October 17, 2019 at 10:41 pm

    Hello! What do you think of textured soy protein (TSP)? Is it good?

  85. My Brave Change Posted on October 18, 2019 at 1:32 am

    ⭐️ I started eating a good salad before I ordered any fast food or ate processed food. Slowly, I reduced the size of those meals and became hungrier for veggies and fruit over the course of 4 weeks. Now I'm actually cooking 2 to 3 times per day instead of 0 or 1 and I'm craving the veggies! Soda is tough, but I'm reducing it the best I can. Sugar in my coffee is next. Gotta find a nice flavored drink I like (I'm a drink lover) that is wfpb like most of what I eat now 🙂 All I know is over the course of this past month I've become happier, more energetic, I have less inflammation, my focus and memory are better, and I can breathe better. I don't even want much of the processed stuff now but even when I do I can have a little. But, binge eating is something I gotta watch out for so I do try to keep that stuff out of the house and just binge on my huge salads LOL!

  86. at me Posted on October 18, 2019 at 2:24 am

    I just heard David Sinclair say this, can't wait to watch!

  87. michael onello Posted on October 18, 2019 at 4:00 pm

    Thanks Dr. G…!

    Vegan plant based whole foods on Instagram == mikewakethefoodup

  88. Kovačević Dobrina Posted on October 20, 2019 at 3:52 am

    Im tired of eating,

  89. Rt L Posted on October 20, 2019 at 10:36 pm

    I am very surprised you cited the conscientious objector study. I thought there was a generally accepted convention against using data from unethical research.

  90. Cummings Family Posted on October 21, 2019 at 11:22 am

    I feel like this video ended early? How much should we reduce our calories by? Too little and we gain it all back? 50% is a little much 😂