Doctor's Note

For other, more recent videos on the health risks associated with mercury, see:
Mercury vs. Omega-3s for Brain Development
Hair Testing for Mercury Before Considering Pregnancy
Nerves of Mercury
How Long to Detox From Fish Before Pregnancy?
Fish Intake Associated With Brain40 Shrinkage
Pollutants in Salmon and Our Own Fat

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 companion video on mercury poisoning from maternal fish-eating. Also, there are 1,449 other subjects covered in the rest of my videos--please feel free to explore them as well!

For more context, check out my associated blog post, Mercury Testing Recommended Before Pregnancy.

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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 companion video on mercury poisoning from maternal fish-eating. Also, there are 1,449 other subjects covered in the rest of my videos–please feel free to explore them as well!

    • Juan Live

      J Ethnopharmacol. 2012 Feb 15;139(3):765-71. doi: 10.1016/j.jep.2011.12.010. Epub 2011 Dec 13.
      5α-reductase inhibition and hair growth promotion of some Thai plants traditionally used for hair treatment.

      check this thai plants inhibit 5 alpha red… hope it helps

  • zack

    Im just curious. You eat a healthy plant based diet (vegan) i assume, and usually the people that do have great hair health but ou seem to be balding. Is this a genetic thing or maybe exposure to something in your past?

    • Juan Live


  • Amit

    Dr. can olive oil using on scalp prevent DHT ? if yes, can it work so actively . Actually as you know revivogen a natural DHT inhabitor product which has omega3( i believe its derived from either flax seeds, olive oil or fish) plus it has alcohol which I think make it quite active along with zinc. revivogen is quite thin actually. it really works , I’ve found it incredible product but its costlier to me that is why I also bought hairmax comb also which is a one time investment but I believe I still miss revivogen.
    I want something topical, so I was searching what aleternative can be of revivogen, last week I used extra virgin olive in my hair at bedtime , trust me any kind of itching/ tigling which specially occurs after hairmax went away, i washed hair in the morning they were shiny like they had a life, though revivogen also does same work. I am just wondering can it really helpful using olive oil into scalp to stop DHT ?

    • barbarabrussels

      check out amla in smoothies or on scalp. Good luck.

    • dave

      to help stop DHT use saw palmetto herb good for both your hair and prostate, and fo-ti herb also good for hair and keeps it from graying.

  • Jenn

    Are there any studies you know of that show correlation between diet and alopecia? I could not find anything on this site or pub med, but I may have missed something!

    • mparent

      Me too, i’ve read several blogs regarding vegetarianism and hairloss. I’ve heard b12 and possibly zinc can help, but was hoping to see some studies regarding diet and hair loss.

  • Guest

    Can you say the same about Japanese? I only look at your site 1h and concluded that you cherry picking studies to supports your claims.

  • Ryn Wedunashe Mahlunge

    What is a fish frog

  • Saved1973

    Where there studies to determine which fish had the least mercury contamination? Thanks, love your videos.

  • Hello

    Hi Dr. Greger, I would much appreciate your help with a hair loss issue.

    Young woman in 20’s, at least half of my hair fell out and keeps falling out since going vegan several years ago; it’s so much thinner, dull, crazy split ends and breaks easily; my nails became brittle and have ridges. No weight loss, actually some weight gain, regularly active, supplement with D3, B12, and Iodine. I’ve been coming across a lot of testimonials of people losing hair after going vegan and regaining hair health after including meat again. I’m worried. I don’t want to start eating animals, but I’m at a loss how I can help it. Appreciate your suggestions, thank you!