Several cross-cultural studies (published in Lancet and the American Journal of Psychiatry, among others) have shown lower rates of depression and bipolar disorder in populations consuming more seafood; neurological studies reveal that it's the omega-3 fatty acids in ocean fish that specifically combat the blues. These compounds (also important to cardiovascular health) accumulate in the bodies of predators whose food chains are founded on plankton or grass - like tuna and salmon. And like humans used to be, before our food animals all went over to indoor dining. Joseph Hibbeln, M.D., of the National Institutes of Health, points out that in most modern Western diets "we eat grossly fewer omega-3 fatty acids now. We also know that rates of depression have radically increased, by perhaps a hundred-fold."

Page 300 of Animal, Vegetable Miracle

This is why I take a fish oil pill people, I'm just sayin'!
Even if you don't follow Lent, you might want to add some seafood once or twice a week, mk?