I’ve been taking fish oil for several years now, but not to improve my brain power. (At my age, that’s a lost cause.) Rather, I take them to help with high cholesterol and blood pressure. I wish the study had also reported on that aspect of fish oil.
We are so complicated that one miracle cure seems unlikely. Doing a holistic lifestyle makes much more sense. The brain does degenerate after 70 but it does not stop growing. We go from using specific areas of the brain to all areas. Moderate exercise for O2 is a must.
Forget the fish oil, just eat the fish.