Fasting webinar

Sign Up for My Webinar on Intermittent Fasting

Some of the most common questions I receive are about ketogenic diets and intermittent fasting, so I’ve done a deep dive into the research on both topics and am excited to finally present my findings. You can learn about the latest science on the keto diet in a 7-video series on my new streaming DVD (see below for more information).

As for intermittent fasting, I’m excited to announce I’ll be hosting a 3-hour live webinar on July 26th at 2pm ET. I’ll cover the pros and cons of calorie restriction and water-only fasting for weight loss, alternate-day fasting, body fat, longevity and metabolic health, the 5:2 diet, fasting-mimicking diets, and time-restricted feeding – and host a Q&A at the end. The focus for this webinar will be on weight control, but I am planning to do a second webinar later this year on water-only and Buchinger modified fasting for other conditions such as blood pressure, autoimmune disease, and cancer.

All of the information will eventually be available for free on, but for a donation to our 501c3 non-profit, you can hear it all first and ask questions right on the spot. To register for the intermittent fasting webinar, visit

UPDATE: Thanks to everyone who attended the webinar. If you missed it, the digital download is available here:

New DVD covers keto diet

vol 47My new DVD is out today and is available as a streaming video so you can start watching it immediately. As you can see below, the main focus is a 7-part video series on ketogenic diets, but I also cover a variety of more practical tips such as pressure cooking, the best kind of water filters, and a warning about overdoing the three oxalate-rich greens: spinach, swiss chard, and beet greens. All of these videos will eventually be available for free online over the next few months, but if you don’t want to wait, you can watch them all streaming right now. You can also order it as a physical DVD.

Here’s the full list of chapters from the new volume—a preview of what’s to come over the next few months on
  1. Oxalates in Spinach and Kidney Stones: Should We Be Concerned?
  2. Kidney Stones and Spinach, Chard, and Beet Greens: Don’t Eat Too Much
  3. Berries for Inflammation and Osteoarthritis Treatment
  4. Should You Floss Before or After You Brush?
  5. How to Treat Reflux in Children with Diet
  6. The Effects of Marijuana on Fertility and Pregnancy
  7. A Political Lesson on the Power of the Food Industry
  8. Best Foods for Colon Cancer Prevention
  9. The Best Diet for Colon Cancer Prevention
  10. Benefits of Flaxseed Meal for Weight Loss
  11. How to Stop Tooth Decay
  12. Plant-Based Diets Recognized by Diabetes Associations
  13. How Many Calories Do You Burn Chewing Gum?
  14. Does Chewing Gum Help with Weight Loss?
  15. Avoiding Fish for 5 Years Before Pregnancy
  16. Is It Best to Drink Tap, Filtered, or Bottled Water?
  17. Are Weight Loss Pills Safe?
  18. Are Weight Loss Pills Effective?
  19. Does Pressure Cooking Preserve Nutrients?
  20. Is Keto an Effective Cancer-Fighting Diet?
  21. Keto Diet Theory Put to the Test
  22. Keto Diet Results for Weight Loss
  23. Is Weight Loss on Ketosis Sustainable?
  24. Are Keto Diets Safe?
  25. Keto Diets: Muscle Growth and Bone Density
  26. Does a Ketogenic Diet Help Diabetes or Make It Worse?
Order my new DVD at or as a video download/streaming at And remember, if you watch the videos on or YouTube, you can access captions in several different languages. To find yours, click on the settings wheel on the lower-right of the video and then “Subtitles/CC.” 
If you were a regular supporter, you’d already be a keto expert by now, having already received a link to the new DVD. New DVDs and downloads are released every nine weeks. If you’d like to automatically receive them before they’re even available to the public, please consider becoming a monthly donor.

Anyone signing up on the donation page to become a $25 monthly contributor will receive the next three downloads for free, and anyone signing up as a $50 monthly contributor will get a whole year’s worth of new DVDs (as physical DVDs, downloads, streaming, your choice). If you signed up for physical copies, your copy is already on its way to you, if you do not have it by now, please email and we’ll make everything all better.


Have Your Donation Matched

matching campaignAnd if you donate now, your dollars will be doubled! Supporter Steven Oliveira has made a generous offer in honor of his father. All donations made through this link will be matched up to $10,000. Here’s what Steve had to say: 

June 13th will mark the one year anniversary of my father’s passing. He suffered from heart disease, kidney stones, dementia, GERD and macular degeneration. Watching the deterioration of my Dad’s health inspired me to learn about nutrition. When I discovered I was blown away; I owe Dr. Greger and the team so much for improving my health and can only imagine how many people have benefited from their work. So in honor of my dear father, I’m offering to match up to $10,000 donated to help spread the word and improve the lives of as many people as possible. We all deserve to know the truth about our health and I’m so thankful we have great people working tirelessly to help us get it. I feel proud and honored to make a contribution that I know will help better the lives of so many people. 

Thank you so much, Steve!  Update: Thank you to everyone who helped hit the match in a matter of days! You can still donate here anytime if you’d like to support


Live Q&As June 27

Live Q&AEvery month now I do Q&As live from my treadmill, and Thursday, June 27 is the day.

  • Facebook Live: At 12:00 p.m. ET go to our Facebook page to watch live and ask questions.
  • YouTube Live Stream: At 1:00 p.m. ET go here to watch live and ask even more questions! 

You can now find links to all of my past live YouTube and Facebook Q&As right here on If that’s not enough, remember I have an audio podcast to keep you company at, and you can listen to my recent interview on the Plant Proof podcast here.


Michael Greger M.D., FACLM

Michael Greger, M.D. FACLM, is a physician, New York Times bestselling author, and internationally recognized professional speaker on a number of important public health issues. Dr. Greger has lectured at the Conference on World Affairs, the National Institutes of Health, and the International Bird Flu Summit, testified before Congress, appeared on The Dr. Oz Show and The Colbert Report, and was invited as an expert witness in defense of Oprah Winfrey at the infamous "meat defamation" trial.

38 responses to “Sign Up for My Webinar on Intermittent Fasting

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    1. If ‘intermittent fasting’ is eating 12 or fewer hours of the day, I do that. I have busy days, and see no need to eat if I am not hungry. Usually have 2 meals and a snack.
      I have twice done Dr. Longo’s ‘fasting mimicking diet’.
      Unfortunately will be on vacation with no electronics when Dr. Gregor does his fasting webinar. Would really like to hear that!

      1. Marilyn,

        Did you buy ProLon or do your own version?

        I bought it, but have ended up giving it to Cancer patients. I wanted to try the soups, but not this time.

        I don’t eat breakfast normally, but it has not been a benefit to me in any way that I can tell.

        I listened to Dr. Greger talking with….. Mic…. maybe and he said that we have to turn it upside down and skip dinner. I have been thinking about whether I could do it. I suspect it would mean doing one really big meal per day at lunch for me – because sleep issues are what throws off breakfast for me.

        I think the only way I could do it would be to allow breakfast to be thrown off, but eat everything I can think of at work and skip dinner, too.

        I will have to listen to the Webinar.

        1. Deb, did my own version. Made sure I only used similar ingredients for each meal. Also calculated so I had the correct number of grams of fat and protein, almost exact for carbs and calories. Not only for the day, but for each meal. (I had a copy of the breakdown and ingredients for each.)
          So was exact on the protein and fat, came in just a bit lower on carbs and calories. I did the 5 day fasts 3 months apart.
          Dealing with calorie restriction for short periods was once normal in most cultures. I do believe that fasting upregulates autophagy.

          1. Yes, I agree about Autophagy and that most cultures probably did face things like famine and Winter.

            I remember hearing conversations about the Pilgrims first year in Plymouth and they said that they ate 5 kernels of corn per day and I remember wondering how any of them survived, but it is likely that the ones who did survive ended up stronger after. Maybe.

        2. I have gone through 3 cycles of the FMD using my own 600 cals/day version, where I matched the ratio of carbs, fats, and proteins listed on Dr. Longo’s patent.

          Carefully selecting a variety of the most nutrient dense foods, (ie; bok choy, cabbage, cucumbers, celery) provides a sizeable amount of food (about 1 lb/day). making the diet much easier to follow than a pure water fast (which I also tried). If I were obese, however, I might lean towards a water only fast.

          1. Please keep in mind several important point: 1) your 600 cal/day regimen is much safer than a water fast; 2) water fasts longer than a day or so should be medically supervised as patients have died trying them. Also, even on alternate day fasting, the long term results of maintenance of weight loss and reduction in serum cholesterol levels is more favorable with your 600 cal/day regimen. For the past several months, I have fasted on alternate days and eaten WFPB on the “eating days”. I have stopped, and now eat something similar to your 600 call/day regimen instead, after watching Dr. G’s review of the studies.

  1. Looking forward to all of it!

    I have been over at the PEMF community and though I love the integrity of the leader and enjoy learning about PEMF, I am surrounded by Keto / Intermittent fasters some of whom are deniers about veganism.

    I have been able to hold my own even though one keto man tried to get me to say that you are an inferior doctor to one of the doctors he follows.

    By the end, he acknowledged Keto bias and acknowledged that he has never heard the full Whole Food Plant Based argument. He hasn’t heard almost any of it.

    He tries to run over me every single day, but he comes from relatives who have died from Alzheimer’s so we are doing one topic at a time and yesterday he had to wrap his head around how his vegans are inferior because they struggle to get enough B Vitamins and B vitamins help preserve brain became my Homocysteine already would have dropped 20% the first week and can get down as low as 5 and he is going to demand labwork proof from me, but I can’t afford it this close to property taxes.

    1. That man has done the process from the Seyfried and Fung and Dr Patrick and Bredesen and other doctor side, but I have listened to both sides so even with all the brain problems I have and even though he is college educated in science and reads studies easier than I do. Listening dispassionately bests arrogantly arguing without knowing the information from both directions.

      1. I was using a vehicle running people over analogy, but, yes, he aggressively comes at me and wants me to say that vegan is inferior and his doctors are superior. Then, I respond and he gets nice and humbles himself and says that he wants a discussion, but he is a denier about the Adventists (To him, they are a religion who talked people into promoting them) and he is a denier about Dr. Barnard’s mechanism for Diabetes and he is skeptical of every single thing. Then, he gets nice and we can discuss things again.

        You can decide whether that fits what you are trying to communicate.

        1. Deb, some people turn their diet choices into a religion. They can get pretty belligerent. Dr. Gregor, on the other hand, has a well-balanced approach.

          1. The man is emotional about Keto and has heard all of the logic from that direction. He had never heard Dr. Barnard or Dr. Ornish or Dr. Esselstyne or the Sherzai’s. I do believe that he said that he had seen a few of Dr. Greger’s videos and he called them “entertaining” and said that in the dismissive way that people who look down on people say it.

            The thing is, in the University he went to, he learned to analyze studies and his whole process is “Which is better?” oriented and mine is “What can I learn from this person?” oriented.

            I told him that I would not like it at all if he was going to start putting people like Dr. Greger down and he said that I was brainwashed or something like that. He reached out to me on a private chat on the site and we have been talking topic after topic, but I just would never be comfortable in any “My doctor is better than your doctor” discussion about ANY of the doctors, even the ones like Seyfried or Fung who are Keto oriented.

            I have said it, but it is so hard for him. He gave me the Keto version of Mastering Diabetes and I gave him the Whole Food Plant-Based version and it really seems like the same web designer is working on both sides. Not kidding. He gave me the Keto weight lifter site and the Keto Alzheimer’s doctors and I already listened to everyone he wants me to listen to and I have already talked everything through on this site with people like Tom or just me rambling through the topics.

            What I am going to say is that when Doctor Greger does Intermittent fasting and water fasting, he is going to have all of them watch that series. Dr. Greger, make that series a good one.

            1. Also, everybody over there is doing the electrical body focus. Zach Bush did a version I didn’t mind, but the “no studies theoretical, sound like an electrician” versions are out there. I say it because that is the next “big thing” and I don’t know if nutrition helps our internal batteries.

              Zach Bush did how RoundUp hurts our internal junctions. Or some sentence like that. My brain is tired tonight. The number of people from the Keto / intermittent fasting side who are also into our electrical structure is so high and Zach Bush showed the structure looking like all these little apertures. I have to watch it again, but the tight junctures are I think one of the subjects.

    2. You could refer him to this review of dietary fatty acids and dementia risk. Among other things, it notes

      ‘The majority of studies that examined the relationship of dietary fat composition to a decline in cognitive abilities adjusted for other types of fatty acids in the analyses (Beydoun et al., 2007; Devore et al., 2009; Eskelinen et al., 2008; Heude et al., 2003; Morris et al., 2004; Okereke et al., 2012) or at least partially adjusted for other fatty acids (Naqvi et al., 2011; Vercambre et al., 2010). Those studies that adjusted for other fatty acids consistently showed increased rates of cognitive decline with higher intakes of saturated fatty acids.’

      Given that most keto types seem to consume large amounts of saturated fatty acids, he may well be increasing his risk of Alzheimer.’s instead of diminishing it.

  2. Very interested in your findings, but will have to wait for the free info! I’ve been intermittent fasting for about six months and vegan whole food for only two weeks, but I am loving learning all these facts!

  3. Okay, I am going to try to register for the webinar, but it is hard to get topics for the Q&A and my question is about women and intermittent fasting.

    Mic the Vegan did a video on it and his mentioned that women don’t get the metabolic benefits and that women can get glucose tolerance issues.

    I will be disappointed if women aren’t covered someplace in the information,

    1. The “Keto is superior” guy and I talked things through and I told him that I am not going to like it if he just keeps insulting me and he got nice and we have agreed to hold off on the discussion for a while.

      He did say something nice. He said that I have already learned a lot on my own.

      (On my own is not quite accurate.)

  4. hello
    as a cancer survivor, i have learned so much from Dr. mcGreger’s you tube talks. i donated money for the intermittent fasting talk, but forgot bout the date (chemo brain!) and missed it.
    is it possible for stragglers like me to still see it instead of waiting for way down the road.

    i cant tell you how many people with whom i share the webiste
    and how often i cc the short you tube videos. thank you so much again, and i am happy to become a yearly donor. … One suggestion: the talks advertized on the right, it has the name and date of the talk, but not the location, uinless it’s in the title. id love to consider going, but cant open up each of the talks time wise to find out where etc,… can the locations be added?
    kind regards, sue

    1. Hi Sue,

      Thank you so much for donating to attend the webinar! You did not miss it – it’s on July 26th. The webinar will be held online via Zoom (more about Zoom here: and we will send out an email with detailed instructions for how to join on July 19th!

      As for the locations of all of Dr. Greger’s talks, this link will be more helpful:

      I hope that helps. Thank you again.

  5. i do have a question : i hope it will be addressed with Dr. McGreger’s diplomatic charm in the intermittent fasting talk:
    “How can well-edcuated experts and specialists in medicine, who actually AGREE about the benefits of fasting, also advise such radically different diets, when they seem very capable of analyzing and critiquing research?
    im thinking of pro-keto medical doctors like Dr. Jason Fung, nephrologist in Canada, many chiropractors, versus the high starch diet of Dr. Macdougal versus the more green veggie based diet of Dr. J. Fuhrman M.D. Then whatever Dr. Oz advises, (keto i think…) not to mention Dr. Atkinson. I find Dr. Fung’s analogies, lectures and stats for fasting to be brilliant , but now have serious reservations about the high meat and fat diet , regarding longevity, and preventing cancer and cancer recurrances.

    im suspect i spurred on my hormone positive breast cancer by enjoying bacon, ham, ribs, eggs, chicken , beef, “healthy veg oils” ,animal fats and butter as my keto diet for a few years before my diagnosis.
    At the time i had bought Dr. Mercola’s book “Fat for Fuel” , believing it to be the final answer…

    In retrospect, on closer reading, dr mercola writes, on page 52, ” if carbs versus protein were your only choices, protein RESTRICTION may in fact be more important than carb restriction”.

    He then said, .. “there are many long term drawabacks to eating EXCESSIVE net carbs, so it SEEMS A RATIONAL CHOICE to replace net carbs with high quality healthy fats, and restrict protein to just the amount your body needs for maintenace and repair. ”

    unfortunately, people on keto usually eat a huge amount of tasty animal protein . there is the ASSUMPTION that a lot of fat can still be good if using “healthy fats” . He does NOT refer to “HEALTHY carbs” (plant based WHOLE food , ie not processed) and ASSUMES that most peoplel will eat EXCESS carbs (i assume he refers to mainly processed carbs as hard to eat whole food carbs in huge excess). I looked for his actual RESEARCH as to how a body can live on mainly fat for calories with maintenance protein.
    its interesting that in one of the early pages, he comments on how most people would go off the rails on a higher carb diet … (an assumption)… and so he says…. as another assumption or theory (vs research) … …”so it seems a a RATIONAL CHOICE to replace net carbs wtgh high quality healthy fats.. and restrict protein to just what you need. ”

    so this says to me that the using of fat to rplace carb was more of an assumption… the only people i know who naturally eat this way are the Inuit in the artic who eat seal meat and blubber, and a few berries. they live in minus 40 winters and dark days, … and how long DID they live ?

    another question i hope Dr. McGreger can address is:
    why do studies show that both keto diets /high in fat, and the plant based low fat diet , BOTH reduce blood cholesterol, triglycerides, diabetes, high blood pressure and the “metabolic syndrome”, and both low carb and the plant approach BOTH can “reduce cancers”? (especially brain tumors with the keto diet, hormone driven tumors with the vegan diet if not eating too many Omega 6’s)….

    I think the keto diet is very helpful for young and athletic sorts, but artificial given there is just not that much fat in the wild world except the artics, (all other parts of the world all the animals are LEAN and veg oil is modern artificial product…

    if you are older, prone to immune disease or cancer, the keto will back fire due to the amount of animal protein and excessive fat.

    i hope i can see dr mcgregers lecture about fasting, hope i can be advised how to catch up and use my donation for that. many thanks , sue

  6. Whoops!

    Right after finishing your previous email and commenting about the ketogenic diet (I didn’t mention intermittent fasting, even though I am doing that too), I opened the next email. It is from you on, yes, ketogenic diet and fasting.

    Great! Good to find out you are on top of the subject. I will be looking forward to learning what you have already said/written about the ketogenic diet and fasting.

  7. Please make some videos on weight gain on wfpb ,I know you already have a blog post on it,but is there any research you came across when reading about weight (loss) studies? Thanks! There is so little for the vegans on the other side of the scales…

  8. Hi, Vegan pal! The key is to focus on the most nutrient-dense foods and, of course, exercise as you are able. If you are eating mostly vegetables, with a little bit of low-glycemic fruit, whole grains, legumes, nuts and seeds, you are likely to lose weight. Avoid processed foods, including bread, if you are having trouble losing weight on a WFPB diet. Make sure you are getting enough (but not too much!) iodine and selenium to support healthy thyroid function. More on that here: You can find everything on this site related to weight loss here: I hope that helps!

  9. Sorry, but It’s not possible to watch the replay after downloading the recording. With which software can you read the recording?
    Thank you for your answer.
    Best regards
    Dr Jean-Claude Ravalard

  10. I have been obese for at least 15 years at 6’2″ 254 lbs and prior to that overweight since age 30, now age 61. I felt I needed to make serious changes and opted to do a water only fast to kick start the process. 3 days ago I completed a 12 day water only fast dropping 22 lbs and have since started re-feeding on 18-6 fasting schedule with a strict whole foods, plant based, SOS free diet. The food tastes fantastic but I am shocked to find I cannot eat anywhere close to the volume of food that I used to consume. I find I am full fairly quickly where normally I would have had seconds and now can’t even finish my plate because my stretch receptors are ringing so loudly. I would imagine this is what lap band surgery feels like.

    When I added up the calorie load which I know I shouldn’t bother with on a diet such as mine, it’s definitely south of 1200 for the day and it concerns me. I don’t want my body to think I’m attempting calorie restriction pushing my set point lower not allowing me to lose additional weight since per the Mayo Clinci BMI calculator I’m still at a 29 BMI.

    I’m glad for the weight loss but……….what does a guy do?

  11. First congratulations for training your taste buds to again enjoy healthy foods again. Yes you’ll want to lower your BMI, but considering how long you’ve been overweight, you can’t expect major changes in BMI in 15 days. If you continue with your intermittent fasting it will lower. Meanwhile you need to monitor your eating to determine if you are having any symptoms related to a relatively low level of calorie intake. You may want to consider trying the Daily Dozen to ensure you’re getting the nutrients you need. If you are doing that you will not have to second guess yourself about calories. Eating some more veggies if you’re hungry will come naturally and you’ll not risk not getting the nutrients you need

    1. Thank you for the advice Joan. It seems it just takes a few days to get my stomach accustomed to eating more volume of veggies. The good news in addition to the weight loss my BP went from the 135/85-90 range down to 107/72 after just a few short weeks.

      I’ve decided to do another water only fast with my wife joining me this time. She needs to lower her BP as well. In fact her whole family is on 3-4 BP meds. Perhaps we can be good role models for them. With this run I might make it just short of 50% of my BMI goal with the rest to cover in Nov-Dec or early next year. Going to settle into the new eating habits firmly and see where it takes me.

      For anyone looking for a SOS free cookbook I recommend a book called “Straight up cooking”. No added salt, oil or sugar and if you transition your tastebuds, the recipes are simple and tasty. It was by a chef at True North.


  12. I find that this information on fasting isn’t available to the general public for free immediately without having to pay for it. Not everyone can attend a webinar to get this information. It’s not the same as the “best berries or the best way to cook vegetables”. This can be life or death for some people. Meanwhile people are suffering and many will die before they can get this information. Personally I was able to glean enough information from other web sources where I could get confident to do several “water only” fasts and lose weight successful and keep it off. It’s helped me to clean up my vegan diet and incorporate a SOS free diet into what I am doing similar to what True North does. Now intermittent fasting and hold my weight level. I improved my foot neuropathy and aching joints to the point I no longer need meds. I understand making money but there is a greater good that could be served that I believe should take precedence. You should make this information free and accessible now. Shame on you if you don’t.

    1. Hi Patrick. Thank you for your comment. We appreciate anyone who takes the time to connect with us and provide us feedback. All of the content in our webinars will be released via for free over time. We host these webinars for anyone who would like to participate in a more intensive, educational opportunity in real-time with Dr. Greger. Planning, organizing, testing, recording, and hosting webinars is a supplemental offering we work diligently to produce and results in many overhead costs for our nonprofit. We have a suggested donation amount of $30 to help offset the costs associated with production of the webinars, but any donation is accepted and appreciated, even just $1 grants access. And for those who sign up, a recording is sent afterward if they are unable to be on live. As always, we are committed to sharing this information completely free of cost on over time, along with thousands of other videos and free resources. We have a large amount of content and work hard to deliver information in as timely a manner as possible. Thank you for your understanding.

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