Can Alzheimer’s Disease Be Reversed with a Plant Based Diet?

Dr. Dean Ornish publishes the first randomized controlled trial investigating whether a plant-based diet and lifestyle program may reverse the course of early-stage Alzheimer's disease.

For more on Alzheimer’s disease, see these videos:
• How Not to Age ( )
• Controversy Around FDA’s Approval of Biogen Alzheimer’s Drug, Aducanumab ( )
• Alzheimer’s and Atherosclerosis of the Brain ( )
• How to Prevent Alzheimer’s with Diet ( )

For more on Dr. Dean Ornish’s work, check out his book Undo It! ( ) And these videos ( ); for more on heart disease, see these videos ( ).

I have more than 500 videos on plant-based diets. You can check them out here ( ).

The best available balance of scientific evidence suggests that the healthiest way to eat is a vitamin B12-fortified ( ) diet centered around whole plant foods. I go into specifics of the Daily Dozen foods I recommend in Dr. Greger’s Daily Dozen ( ). For a more thorough dive into the science on these foods, check out my New York Times bestselling book, How Not to Die ( ).

Join our Plant-Based Living Series. This resource is a weekly email series that gives you simplified takeaways and actionable tips on healthy eating. Whether you're new to a whole food, plant-based lifestyle or would benefit from reminders on some of the key aspects of healthy evidence-based nutrition, this series is for you. Expanding on our popular Evidence-Based Eating Guide, this free series features even more tips and information, and you’ll get it delivered straight to your inbox on a weekly basis. (Don't have your own copy of our Evidence-Based Eating Guide? You can download it as a digital and printable PDF ( ).)

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Have a question about this video? Leave it in the comment section at and someone on the team will try to answer it.

Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at . You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics.

Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM

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Dave McKinnon

  • @NutritionFactsOrg says:

    Stay up on the latest news by subscribing to’s free e-newsletter and receive our Daily Dozen Meal Planning Guide as a thank-you for subscribing. -NF Team

  • @moondovefoxglove5464 says:

    I love you, Dr. Greger.

  • @TheStewieGriffinShow says:

    2:39 Genes load the gun, but lifestyle pulls the trigger.

  • @talyah23 says:

    Brilliant!! 🎉🎉🎉🎉

  • @Aidan_Au says:

    This video can save many people’s lives

  • @yonatan1myers says:

    Your best video in a long time

  • @pdblouin says:

    Compliance is the major factor here. There is no amount of evidence that will convince my parents/step-parents/in-laws to start eating from the How Not to Die cookbook.

    • @channel23753 says:

      Same here. I have a relative who just recently had cancer surgery, and he STILL insists on eating what he wants. It’s frustrating.

  • @ellenled says:

    In terms of elongated telomeres being anti aging….new studies show that elongated telomeres May lead to cancer since the cells are so long lived and mutate over and over. Can anyone address this? Can this be suggested to Dr. G to address?

  • @aldimore says:


  • @soilikasanen says:

    This is great news! Here in Finland – the Dairy Land – we have a high mortality rate of Alzheimer’s disease. All our deceased presidents since 1960’s have died on Alzheimer’s. But for government nothing is as important as keepin’ on consuming dairy, eggs and flesh…

  • @mu999 says:

    Многие лучше умрут, чем избавятся от трупов в своей пище.

  • @fareebug8439 says:

    I can’t thank you enough!! Thank you. Thank you for what you do!!! ❤🎉👏👏👏

  • @lorah3005 says:

    👍 Whole food plant based for the environment and health; vegan for the victims!

  • @wegtennis8740 says:

    So, at 2:47, what’s the rest of the sentence?–This is probably due to a diet that is low in animal fat and high in saturated…..

  • @Hyperion1040 says:

    Don’t forget to supplement B12 kids 🙂

  • @stavokg says:

    I love Dr Greger! And I love his humor. I said it before: he is a national treasure.

  • @fjalar4856 says:

    This is huge. Thank you for facilitating the healthiest path.

  • @Alexander-ok7fm says:

    Very important topic! Thank you 😊

  • @parkersavage8774 says:

    Fantastic! I heard that Dr. Ornish was doing this study late last year and was very hopeful. Despite there being some problems with the study (compliance, placebo, etc.) the results look very promising for people who take it all the way on good lifestyle habits! Hopefully we start seeing more studies like this sprout up.

  • @PlantChompers says:

    I talked to Dr. Ornish about this study months ago and HAVEN’T BEEN ABLE TO WAIT for it to be published! 🎉 Great video. 👏

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