The problem with fish advisories that tell pregnant women to cut down on fish is that it may be too late for certain persistent pollutants. Subscribe to Dr. Greger’s free nutrition newsletter and get the Evidence-Based Eating Guide: A Healthy Living Resource from Dr. Greger and NutritionFacts.org. Sign up at
In my previous video on this topic, How Long to Detox from Fish Before Pregnancy ( I mentioned a study that suggests detoxing from fish for one year to see mercury levels decrease, but other pollutants take longer to leave our system.
For optimum brain development consider a pollutant-free source of omega 3 fatty acids: Should Vegan Women Supplement with DHA during Pregnancy? (
There are also non-pollutant reasons may want to avoid excessive amounts of any animal protein. See: The Effect of Animal Protein on Stress Hormones, Testosterone, and Pregnancy (
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-Michael Greger, MD FACLM
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