Doctor's Note

Check out these videos on fraudulent claims made by supplement companies:
Dietary Supplement Snake Oil
Raisins vs. Jelly Beans for Athletic Performance
Safety of Noni and Mangosteen Juice

And check out my other videos on snake oil

For more context, also see my associated blog posts: Vitamin B12: how much, how often? and Soy milk: shake it up!

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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 snake oil. Also, there are 1,449 other subjects covered in the rest of my videos–please feel free to explore them as well!

  • Alfredo

    Dear Dr. Greger,

    would you please talk about B17 supplements in one of your videos?

    I thank you very much, 

    • Toxins

       Vitamin B17, also known as Laetrile, is neither a real vitamin nor a cancer cure. It has been shown to be worthless.

      N Engl J Med. 1982 Jan 28;306(4):201-6. A clinical trial of amygdalin (Laetrile) in the treatment of human cancer.

      Milazzo, Stefania; Stephane Lejeune, Edzard Ernst (2006-11-15).
      “Laetrile for cancer: a systematic review of the clinical evidence”.
      Supportive Care in Cancer.

      Milazzo S, Ernst E, Lejeune S, Schmidt K (2006). “Laetrile treatment for cancer”. Cochrane Database Syst Rev (2): CD005476.

      Schraub S. (2000). “Unproven methods in cancer: a worldwide problem”. Supportive Care in Cancer 8: 10-15

      It is not approved by the U.S. Food and Drug Administration (FDA) as
      a treatment for cancer or any other medical condition. The FDA seeks
      jail sentences for anyone selling laetrile for cancer treatment, calling
      it a “highly toxic product that has not shown any effect on treating

      • David Camerpong

        But these are the sort of comments we expect from the FDA isn’t it?

        • Helga_R

          huh, you are right.
          they also hate vitamin C in high doses, but it’s actually help – I know a few cases
          and vote against iodine for hypothyreoid people.

    • David Camerpong
      Amygdalin, laetril, B17
      Amygdalin inhibits genes related to cell cycle in SNU-C4 human colon cancer cells.

      CONCLUSION: These results suggest that amygdalin have an
      anticancer effect via downregulation of cell cycle-related genes in
      SNU-C4 human colon cancer cells, and might be used for therapeutic anticancer drug.
      CONCLUSION: Our data showed amygdalin could attenuate the development of atherosclerosis by suppressing inflammatory responses and promoting the immunomodulation function of Tregs. The effects of amygdalin ultimately resulted in the enlarged lumen area and the loss of atherosclerotic plaque. All these data indicated the therapeutic potential of amygdalin in preventing and/or treating of atherosclerosis.

      Here, we have shown that amygdalin induces apoptotic cell death in human DU145 and LNCaP prostate cancer cells by caspase-3 activation through down-regulation of Bcl-2 and up-regulation of Bax. The present study reveals that amygdalin may offer a valuable option for the treatment of prostate cancers.

  • Michael Greger M.D.

    Also be sure to check out my associated blog post Vitamin B12: how much, how often?!

  • JR

    Thank you for this site. I have recently become vegan and your site has informed and validated my choice. How wonderful to learn of the great nutrition in the strawberry and the simple white button mushroom! As for the request of topics, perhaps you can speak on Interstitial cystitis (a condition a close friend suffers from) or healthiest low-acid foods. Thanks again!

  • Jean

    What would you suggest for someone who doesn’t have any problem to fall asleep , but only sleeps a few hours and then wakes up can’t go back to sleep. Does not take any sleeping pills only natural products.

    • Ron