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  • Michael Greger M.D.

    Please feel free to post any ask-the-doctor type questions here in the comments section and I’d be happy to try to answer them. And check out the other videos on cancer. Also, there are 1,449 other subjects covered in the rest of my videos–please feel free to explore them as well!

    • forever-ru

      Could you please comment on programs like the one run by Dr. Nicholas Gonzalez who does nutrition therapy for cancers. For most cancers he recommends plant based diets, however, for cancers like Non-Hodgkins Lymphoma he recommends a diet high in red meats. My dad would love to think he could treat his cancer with a steak, but I am hesitant on the whole idea and keep pushing the spinach his way instead. Reputable programs like McDougall, Ornish, and Gerson go the plant direction…Mercola goes with some meat. ?!?!? Who do I believe?

      • Toxins

        Hello forever!

        The fact of the matter is, whole plants are the most nutrient dense sources of food we can come across
        If one is to eat a diet high in meat, putting all health detriments and contamination aside, meat is a relatively nutrient poor food and does not promote the immune system unlike plant sources, which are the only foods that contain phytochemicals and the great majority of the antioxidants. To consider meat a health food is laughable simply looking at its micro nutrient load, which is very small. Looking at its macro nutrients, red meat and dairy are the only natural sources of trans fats, which are recommended to be at 0 grams per day The protein itself, as discussed commonly with T. Colin Campbell has been shown to promote cancer growth as well as the clear link between meat consumption and mortality and lastly, looking at fiber, it is no where to be found in any meat source. I encourage you to also view this video that discusses DNA repair mechanisms (DNA brakes linked with cancer) which are enabled by the phytochemicals and antioxidants in plant foods.

        Please excuse the brashness in my response. It is more to what was suggested by that doctor in your comment rather than your comment as a whole that struck me. Continue your quest for nutritional truth and view all the videos Dr. Greger has to offer for a very complete understanding of the health promoting properties of plants over meat. Whats so great is that you can view the studies yourself to see if you agree too!

    • HemoDynamic, M.D.

      Just came across this vid today. . . Just fantastic!  I just had to give news to a patient today about a new diagnosis of Barretts Esophagus (the first one I have ever seen personally).  Guess who’s is going to get this information forwarded to them.  I already got her on a plant based diet but this is the Vegan icing on the vegan cake!
      I’m just bummed I hadn’t come across it sooner.
      Great job on this video.  I kinda like the longer length of this video as well.

  • I just became a vegan 14 months ago. I wish I knew how great it is a long time ago.

  • Mike Quinoa

    Wow…that’s powerful stuff. All these videos are incredibly informative, but this one is a must-see.

    • Michael Greger M.D.

      If you didn’t already, please rate the video (click on the stars) so it will bump up in the “Highest Rated” category and more people will be able to discover it–I’m glad you did! For more videos on cancer, please click here.

  • I am a 4th generation vegan. My Great grandmother had breast cancer at 50. The second gen vegan got breast cancer at 78. The 3rd and fourth who added soy have no breast cancer. I am sharing this at Weimar Center of Health and Education, Weimar, CA to our residential patients. They love it.

    • Dr. McDougall would agree. Apparently soy increases IGF-1 more than milk.

      • DebbieSLP

        It’s only the processed soy that increases IGF-1. Whole or minimally processed soy foods, like edamame beans, soy milk, and tofu, do not raise IGF-1.

        • Soy milk is heavily processed.

          • It’s actually not. It’s simple to make at home. Some packaged soymik may have additional ingredients, but that varies widely. The basic formula is not very processed at all though. Studies such as the Shanghai Study show an inverse relationship between soyfoods including soymilk and breast cancer. In a study of 14,000 Seventh Day Adventist men, those who regularly drank soymilk instead of cow’s milk had a huge drop in prostate cancer rates.

  • berggren73

    Great site and videos. But what about vitamin B12 ? As I understand it B12 can only be found in meat. Or am I wrong Michael Greger? And aren’t there also other benfits than protein, from eating beef from grass fed animals? Thanks /Hakan from Sweden

  • Great stuff! You’ve changed my life for the better.

  • duchaspa

    Hi.Last week I got a yearly visit from a 40 yearold patient who had had ulcerative colitisfor 20 years. I told him to stop dairy and readyour 2001 paper got milk. He thanked me for his colitis stopped forthwith and since he cut all dairy. In chap 1 of China study the’error’ with alpha f protein in Philippino kids and the reproduction in rat studies,I interpret as “Cancer cells need animal protein to grow” If u stop it,they shrink.Ok i am not a scientist but I proposed this to 7 advanced cancer patients 2 of whom were in “palliative stage> All 6 are doing VERY WELL,the oncologists do not understand it.I tell them “plant based diet,no cheating”. It has worked for now,and I am flabbergated. For the record,I got about 4 hrs of nutrition in med school,A whole semester in pharmacology,and 8 lectures on surgery of thyroid cancer this was 1963-1967. I stopped smoking in 1988,stopped meat and dairy in 2005(yr influence Sir),do not worry about future hope to live to 80 but take one day at a time. Thank you for bringing the fun back into my medical practice.

    • Michael Greger M.D.

      I’m so glad you wrote in–you’ve certainly made my day! As much as I love lecturing to medical students and the general public (largely via Rotary), my most fulfilling presentations are grand rounds in hospitals for clinicians. My goal is to reignite that spark they all had when they started medical school to help people, to cure people, to make people better. As you know, too much in medicine these days is just palliation, just covering up symptoms and slowing their downward spiral into disease and disability. When I start going through the case series showing that many of the chronic diseases that make up the bulk of their practices can be reversed, that people can be restored to health, you can see their faces light up. There are powerful tools at their disposal that no one ever taught them about. Please let me know if there is ever anything I can do to help further..

      In terms of some of your individual points, the latest review on the theory that a farm animal pathogen in meat and dairy may be triggering inflammatory bowel disease is worth the read: Ulcerative colitis and Crohn’s disease: is Mycobacterium avium subspecies paratuberculosis the common villain? If indeed these diseases are related to diet, then the good news the review concludes with is that “We can end the public health tragedy of Crohn’s disease, and ulcerative colitis, in our lifetimes.”

      And I continue to be as excited as you at the possibility that certain cancers can be stopped and reversed through diet as well. I’ll keep bringing everyone the latest building off the preliminary results presented here: Cancer reversal through diet?

    • duchaspa – hi. I’m writing a book on the risks of high-protein diets. May I interview you, by phone or email, about what you’ve posted here?

      Please email me at dave at

      Or call me at +61432814888

      I’d be obliged. I need great true stories like yours to make it easier for readers to understand the statistics and research I’m writing about.


  • DrDons

    I can’t add much to Dr. Greger’s excellent response. I too enjoy speaking with physicians. It is rewarding to make patients better but I would suggest you redefine your goal to live a quality life well beyond 80. We need all the physicians who are well versed in primary and secondary preventive strategies. Maybe you could give some presentations locally to other health care professionals.

  • mcarsonbreber

    Thank you so much for your incredibly informative videos! I have been forwarding your links to my family and friends. I found this one especially helpful.

    After listening to this and reading the above comments, I find myself confused about soy intake. Could you clarify if soy milk is helpful or harmful? It is my main source of liquid for smoothies, oatmeal, etc. since not having any dairy.

    Thank you!

  • Carolyn

    Hi Dr. Greger,
    I know you from T.McQuirter’s EatSmart class. My mother has stage 4 lung cancer. She started radiation treatment today for 6 weeks.  I know that diet changes will help her however she is not  ready to embrace a vegan/lifestyle completely.  I started giving her wheatgrass this morning and after radiation treatment.  She will eat some vegan meals that I make from Tracye’s book.  Any other suggestions?

  • Daren

    A very convincing explanation about something we should all be concerned about. 
    Thank you

  • Jordan

    How does a 20% reduction in the growth RATE, and not the growth itself make it possible to show the before and after pictures that are so different?

    Wouldn’t the cancer cells continue to grow, but just at a slower rate?

  • knowledge is power…

  • CJ

    Do vegans get cancer?

    • CJ

      I realise that my question is very grey-area. I specifically meant, those on a non-processed, plant-based, low-fat diet. And if a plant-based diet slows cancer so substantially, is Gerson right?

      • Toxins

         Yes, vegans can get cancer but the risk is much much lower and if one is vegan their entire life, then the possibility of getting cancer is even more slim. Other factors may contribute such as air pollution, pesticides and the like.

  • bellybuttonblue

    I have a skin tag in my armpit. I’m not a doctor, but on the internet I read that it’s a benign tumor. When I started to eat vegan, one of the first things I noticed was that the skin tag was shrinking. I’m on a vegan diet for about 4 months and the skin tag is half the size now. 

  • Magdaleno81

    So does this really work? I don’t Doubt it, but I have a family member who doesn’t believe in this. I would love to hear from somone who has reverse their cancer.I’m trying to get my aunt to follow this. She has stage 4 cancer in the stomach. Any info would be appreciated

  • Joseph Denman MD

    Dear Dr. Greger
    I have developed ALS and am losing weight partly due to swallowing difficulties and reaction to Rilutek. I now have a PEG tube and would like to change my diet to that of a vegan, but do not see how this will provide me with the caloric intake required to replace the 10 pounds i recently lost. I wonder if you could comment on this and point me to any information which might support a dietary approach to management of this disease.
    Eye MD

    • Jan

      Read the research on ketogenic diet for ALS.

  • Sporter

    My dad was diagnosed with secondary brain cancer last year – told he’d be dead within a year and that they would focus on pain management. He decided to forgo radiation and chemo since they’re not effective in trigeminal nerve pain and the cavernous sinus area… decided instead on a strict vegan diet with supplements (based on Dr. Coldwell – The only answer to cancer). So vegan, along with no sugar, no soy unless non-gmo, no vinegar, etc…. that was over a year ago. Since then doctor’s at the cancer clinic have indicated that the MRI’s show the tumor has shrunk and that the blood flow seems to be almost no-existent to the site. Do you have any experience with this? Would love to hear your thoughts..

  • Thank you very much for sharing this informative post.

  • Sue OKeefe

    First of all TY for your informative videos (we bought the complete set) they have taught me so much. I made the mistake of having a 5mm. cancerous tumor removed from my breast 2 mos. ago. I have only been on a strict vegan and juicing, with wheat grass also, diet for 3 mos. My onco. Dr. STRONGLY recommends Femara in case of recurrance in the breast and if it got in my bloodstream through surgery. I’ve said no to radiation but am i making a mistake thinking my diet will prevent the cancer from returning? I would truly appreciate your thoughts on this. TY

  • Catrina Scicchitano

    I have stage 1 C.I.N.. I hear soursop juice is a natural way to prevent 12 cancers. I don’t know what the real facts are. Do you think drinking this would help to prevent my C.I.N. from turning into cancer. I read some things that say its 10,000 times more powerful then a component in chemo.  Other things I read say that soursop can be dangerous if you drink too much. You find all the facts, so I wanted to contact you to see what if anything you might have to share with me about the benefits or hazards of soursop juice for my situation. If I wind up with uterine cancer, I would want to try natural ways to cure it over chemo. I hope to hear back from you. 

  • Agumadu Ifeanyi

    My dad had a prostrate cancer surgery around October 2012, recently he is having heavy blood in his urine and feels weak most of the time. Kindly educate me on what to

    • I would have your father get evaluated by his physician as soon as possible. There are many causes for blood in the urine and weakness. His urologist and primary care physician should be able to pin point the cause of his bleeding. As relates to his prostate cancer… the best diet is a whole food plant based diet although some foods seem to be better then others as relates to prostate cancer. You can find out information about that by going to the video’s on prostate cancer on However it is important for your father to contact his physicians to be seen. Good luck.

      • Ramdath Dhanassar

        Hi My father was diagnosed with stage 2 gallbladder cancer in May, they removed the gallbladder but caused a spill on the liver, he took 6 treatments of chemo and no improvement , I wanted to go all natural , does anyone have a good diet plan that I should follow? Thanks

  • Mary Lynn

    I watched your video on “Slowing the Growth of Cancer” and you discussed how breast and prostate are sensitive to estrogen. By eating less meat, eggs and dairy we can eliminate some of the estrogen. what about cancers that do not rely on estrogen. How does a plant based diet stack up?

    • vegan31

      Mary Lynn, did you ever get an answer to ” what about cancers that do not rely on estrogen. How does a plant based diet stack up”? I would like to know the answer, as well.

  • Jackie Thomas

    I am confused by tamoxifen; I understand how it works, but why does a post menopausal woman have so much estrogen floating around? Are there studies that show plant-based diet is as effective in further cancer as tamoxifen? I think estrogen is carried by the fat cells, so if you are thinner, do you have less estrogen? (post menopausal)? Can you help clear up the confusion?

  • Betty

    What effect do breast implants have on a woman’s risk of breast cancer?
    Should old breast implants (30+ years) be removed?

  • Sam Hopes

    Is there any possibility of combining existing therapies to slow down cancer growth is showing encouraging early results. The existing therapies that will be combined in the METRICS study are
    metformin, statins, doxycycline, mebendazole and ibuprofen, but it was
    by no means a straightforward process to land on these particular

  • JH

    The article that is used in this movie is not a fully plant based one. May I quote:

    “The diet
    consisted of natural whole grains, fruits and vegetables with limited amounts (<3.5 oz) of fish, fowl
    or lean meat and nonfat milk."

    It's largly plant-based.