Doctor's Note

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. Be sure to check out all the other videos on antioxidants and don't miss the videos on heart disease. And there are 1,449 subjects covered in the rest of my videos–please feel free to explore them!

For more context, check out my associated blog posts:  Antioxidants in a Pinch: Dried Herbs and Spices and Hibiscus Tea: The Best Beverage?

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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. Be sure to check out all the other videos on antioxidants and don’t miss the videos on heart disease. And there are 1,449 subjects covered in the rest of my videos–please feel free to explore them!

  • BPCveg

    Fascinating study on flow mediated dilation…perhaps the effects of higher antioxidant consumption by vegetarians (compared to omnivores) may also explain some of the heart health benefits of vegetarianism reported by Dean Ornish’s lab. Given the vastly higher antioxidant content of plant foods compared to animal foods, I wonder if higher antioxidant intake may better explain heart health benefits of vegetarianism than reduced cholesterol/saturated fat intake. I look forward to future videos on this topic!

  • Jubilee

    I stumbled across the
    so called 80 10 10 diet on

    Can you tell me if this diet is great and healthy? Or do people following it risk malnutrition?

  • tree

    yeah choclate has antioxidants!!!

  • Kman

    Could you please do some videos on Whey Protein? I am interested in if they :
    contain any bad chemical residues
    have any cognitive benefits
    have any anti-cancer benefits
    have any satiety or weight loss benefits
    and anything else related to health and illness. Thanks for the great work you do.

    I tried clicking on your Ask the Doctor link but it seems to be broken.

  • Christo Okulian

    Hi Doc, hi Toxins,

    Am crazily addicted w/ health knowledge from doctor Greger and his crew.

    please kindly help me, are there any correlation between arterial elasticity w/ heart beat rate and VO2max ? please kindly provide the literature study, thx much.

  • Caveat M. Tor

    Given that ED drugs work by raising NO levels, and there is now apparently a regimen of daily low-dose Cialis for ED patients, might this regimen be beneficial for an adult male who is physically active, not suffering from ED, but at risk of cardiovascular disease due to age, sex, familial risk, and past diet?

  • Cynthia Chabra

    Dr Esselstyn said on Forks over Knives the Extended Interviews that recent studies now show the same effect on endothelial cells from olive oil, palm oil and soybean oil as from animal fat. Can you address that please?

  • Derrek

    What about BPA tomato paste in cans? I bought some and don’t know if I should eat it or not. I’ll have to buy organic in the future.

    Also would about conventional strawberries, grapes, celery and blueberries? I can’t always afford organic. Should I avoid them then? I’m in college and am broke.

    • Thea

      Derrek: Dr. Greger has a great blog post where he puts pesticide consumption into perspective. :

      “A new study calculated that if half the U.S. population ate just one more serving of conventional fruits and vegetables, 20,000 cases of cancer could be prevented. At the same time the added pesticide consumption could cause up to 10 extra cancer cases. So by eating conventional produce we may get a tiny bump in cancer risk, but that’s more than compensated by the dramatic drop in risk that accompanies whole food plant consumption. Even if all we had to eat was the most contaminated produce the benefits would far outweigh any risks.”


      I translate this bit of info into: Eat organic when you can, but don’t stress about it when you can’t.

      Happily, there is a way to take this advice a step further to minimize your risks without completely depleting the pocketbook. Every year, the Environmental Working Group actually measures pesticide levels in fruits and veggies–after those fruits and veggies have been prepared in the way people would normally eat them. (For example, peeling a banana or washing first.) If you scroll down on the following page, you will see a list for the “Dirty Dozen” and the “Clean Fifteen”.

      I bring your attention to these lists because I think they are very helpful for people who can’t afford to eat organic for everything. You could use these lists to help you decide when it is worth putting down money for organic and when it might be safer to buy non-organic.

  • Lizzi

    Are there any new ideas about how to HELP HAND AND FINGER PAIN?
    I am in a very painful situation with my hands. How can I reverse this and is Aleve safe to take? I do not want drugs, but am Vegetarian with severe hand pain. Thanks for any light we can shed on this~ What foods could help pain?

  • Dt. Kirk McAnsh, D.C.

    Won’t high levels of “NO” contribute to chronic inflammation, more rapid aging and decrease one’s potential for longevity?…

  • Hair

    Coconut oil—- what’s the deal—good or bad

  • Danny

    What role, if any, would an increase in Nitric Oxide play in the “repair” of the endothelial lining of artery? Everything I’ve come to learn about this subject points to a “flexibility” of artery or an “increase in blood flow” benefit.
    I am aware of the fact that the endothelium becomes stiff and cracks as one ages, thereafter causing bacteria to enter and corrupt the “vessel wall” itself. As I understand it, this is the first stage of arteriosclerosis. Further, this stiffening and cracking of lining happens as result of lowered NO levels. Is this to say that an NO increase then would have reverse effect, aka repair of lining? It’s confusing as I’ve noted that there is an “immediate” benefit of arterial relaxation shortly after, say, eating NO increase foods or supplements but how is that possible? Repair of stiffened lining could not happen that quickly!

  • Bill

    I love the videos. Especially that you provide scientific support for each statement. They led me to dramatically change my diet to include many sources of nitric oxide and antioxidants – cocoa, beets, nuts, cumin, cloves, hibiscus, flax seeds, spinach, etc. My goal was to promote the health of my heart and also reduce cancer risk. By some measures my cardio health has improved.

    Some sites warn that it is possible to overdose from nitric oxide. These sites are primarily referring to nitric oxide supplements and inhaled nitric oxide. They warn of a variety of adverse reactions including organ damage.

    My question: Is it possible to overdose on dietary nitric oxide?

    Thank you for creating this great resource. It is more valuable than many doctors I’ve seen in person.