Doctor's Note

For more videos on the health risks associated with mercury, check out:
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 Brain Shrinkage
Pollutants in Salmon and Our Own Fat

And check out my other videos on fish and mercury

For further context, see my associated blog post: Head Shrinking from Grilling Meat.

If you haven’t yet, you can subscribe to my videos for free by clicking here.


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

  • What great education on this topic of mercury from fish
    and poisoning children.

  • santabarbariana

    Does this have anything to do with the rise in Autism?

  • annabella

    I love your website but have to disagree with you about fish. There are other studies that show fish in pregnancy raises the IQ level of children. I ate fish throughout my pregnancies and fed my 3 sons a lot of fish. One has a PhD in Molecular Biology, one is a medical doctor and the other is doing his PhD. Nothing wrong with their brains!

  • Amy

    I thought I was eating healthy for years, eating only chicken and fish for meat. When I got pregnant I did what I was told to do and did not drink alcohol or caffeine, didn’t take any kind of medication, didn’t eat soft cheeses or raw fish, so no sushi and limited my cooked fish intake to 1-2 times per week. My son was born with an Intellectual Disability (ID), his cognitive ability is in the 1%. MRI’s and EEG’s show no gray matter, he did not have any brain trauma or infection. They believe his ID happened during early fetal development. Could eating mercury laden fish be the cause of his ID? Maybe, maybe not, we probably will never know but the maybe is something I have to live with for the rest of my life. I am now a plant based vegan so I can live as long as possible to care for my son who needs me to be alive as long as possible. Perhaps I can prevent one more child from being born with an ID by posting this. Think before you eat!

  • Kristen

    @annabella. Our oceans are much more polluted now that they used to be. Just because your children turned out okay 30+ years ago doesn’t mean they would today.

  • N Nichols

    Study: No Link Between Mercury Exposure and Autism-like Behaviors

    How are we to reconcile the contradiction between sources??

  • Miriam

    Wow that’s crazy but makes sense. Glad I’m vegan