New research shows fatty fish (like-salmon, herring, and mackerel)helps your heart, brain, and circulatory system. A 12-year study of 4,800 people found those who ate fish between one and four times a week had a nearly 30 percent lower risk of atrial fibrillation(a disruption in your natural heart rhythm causing shortness of breath and fatigue).

Scientists at Northwestern University studied over 200,000 people and found eating fatty fish just once a week cut the risk of stroke caused by clots by 13 percent. There was no observable effect on storkes caused by bursting blood vessels.

Women who ate fatty fish almost every day had lower levels (7 to 10 percent) of molecules that cause plaque to stick to artery walls, than those who ate fatty fish only three times a month, according to a Harvard study of over 700 women.