The link between fish consumption and neurobehavioral abnormalities in adults is likely related to mercury toxicity.
Eating a can of tuna once a week is equivalent to living with how many mercury-containing amalgam tooth fillings?
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.