Doctor's Note

Be sure to check out all my other videos on phytonutrients, including yesterday’s: Amyloid and apple juice.

Also, check out my associated blog posts for more context: Alzheimer’s Disease: Up to half of cases potentially preventableFighting Inflammation with Food SynergyAntioxidants in a Pinch: Dried Herbs and SpicesEating Green to Prevent Cancer; and Is Caffeinated Tea Really Dehydrating?

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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 be sure to check out all the videos on phytonutrients, and yesterday’s video Amyloid and apple juice.

  • Wow, never even thought of this, and I guess neither do most people. Thanks!

  • Nicolas

    I wonder how well all of these phytochemicals do with various forms of cooking processes, seeing as studies have only been done for a few of them, such as lycopene? Does anyone have any information on this?

  • Lesleyvictoria

    Hi Dr. Greger, I was just wondering if the juice was standard bottled/tetra pack juice or was it fresh pressed. I assume that fresh pressed would be best but I’m hoping packaged juices hold some benefit because they are obviously much more accessible!

    I love your videos!!! I’m hungry for health information!!


  • jmboss


  • Michael Greger M.D.

    For some context, please check out my associated blog post Alzheimer’s Disease: Up to half of cases potentially preventable!

  • Tracy

    Hi Dr. Greger – I am just wondering how the phytonutrients compare in organic and non organic foods – thank you :) 

  • Michael Greger M.D.

    Please also check out my associated blog post Fighting Inflammation with Food Synergy

  • Michael Bowers

    I am a bit confused about the benefits of fruit or vegetable juice. I have seen some posts that insist that they ARE basically little more than sugary water and that the only real way to get benefits from fruits and vegetables is to eat them in their natural state, not as juices that have much of the nutrients (fiber, pulp, etc.) removed. So should I consider something like orange juice, tomato juice and apple juice “healthful” or not? Thanks …

  • N_

    This site says that only 3% of the beta carotene is converted to the Vitamin A the body needs. Which means you would have to eat a lot, really a lot, of vegetables to meet the Vitamin A requirements.

  • Naresh Kasukurthi

    Could you please suggest a good Mouth wash that prevents tooth decade/cavities or kills bacteria and where it is available ? Thanks!

    • Thea

      Naresh: There is a very interesting video about green tea that is coming up on NutritionFacts and that has to do with your question. Stay tuned!