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. And check out the other videos on blue-green algae. And note that chlorella is not in the same category as blue-green algae. Also, there are 1,686 other subjects covered in the rest of my videos--please feel free to explore them as well!

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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 blue-green algae. And note that chlorella is not in the same category as blue-green algae. Also, there are 1,449 other subjects covered in the rest of my videos–please feel free to explore them as well!

  • Becky

    I was wondering if you know anything about Carageenen from seaweed, so far I’ve read that it isn’t good to consume, however some vitamin supplements have it, is this such a small amount I shouldn’t worry? Sorry I wasn’t sure where to post this.

    • Michael Greger M.D.

      As a precautionary measure I would recommend those with inflammatory intestinal disorders try to stay away from it. Still unclear whether it should be avoided otherwise. I’ll keep an eye out for new research–thanks for your question!

  • Michael Greger M.D.

    For some context, please check out my associated blog post Multivitamins and Mortality!

  • http://www.facebook.com/PurplePriestess Katharine Clark

    I would with the wild blue green algae and ee are PROVEN to be BMAA free (is 3rd party). We are NSF certified, proving we are clear of all contaminants including microcystin   http://www.simplysuperfood.com

  • http://www.facebook.com/PurplePriestess Katharine Clark

    Sorry – that was strange.  I work with the wild blue green algae from Upper Klamath Lake. While there has been a lot of negative press our algae is safe. I have been eating it 25 years.
    1. We are PROVEN to be BMAA free (is 3rd party)
    2. We are not farmed, and we are organic, removing herbicide/pesticide issues
    3. We are NSF certified, proving we are clear of all contaminants including microcystin

  • Jesse

    so you say that we should all take 250 mg of algae based DHA everyday but stay away from spirulina, chlorella and blue green. what gives?

    • http://nutritionfacts.org/ Michael Greger M.D.

      The algae-derived EPA/DHA is from golden algae.

  • Francisco Carreño-Galvez

    I have researched regarding the blue-green algae Aphanizomenon Flos-Aquae (AFA), since I found it in the book “Healing with Whole Foods” (Paul Pitchford) and found out that there are certain studies with specific extracts that haven been proven to be toxin-free. So, since there are a huge number of benefits from using AFA (among other types of seaweed), WOULD YOU CONSIDER POSITIVE TO INCLUDE IT IN OUR PLANT-BASED DIET? (most like likely in form of extract) Thank you.

    • Karen

      Yes, please answer this question, Dr Greger. I stopped taking mine after reading your opinion of Spirulina, but my arthritis is getting worse since I stopped taking it.

  • Mc

    How do you feel about green powders such as amazing grass supplements and garden of life green blend powders? These contain blue green algae, but many other things as well.

  • steff

    Do you know anything about lithothamnion…algae from Iceland used for calcium in bone health supplements?

  • Abi

    Hello there! My vegan daughter’s favoured soya milk is calcium fortified with lithothamnium calcareum seaweed/algae. Is this a good and safe seaweed for us to be consuming?

    Many thanks.