We used to eat a lot more foods that are high in Omega-3 fatty acids like fish, wild game. Now foods are much higher in Omega-6 fatty acids and the rates of depression, cardiovascular disease and inflammatory diseases have gone up with the change in the diet. So there have been lots of studies looking at Omega-3 fatty acids or fish oil to treat rheumatoid arthritis, to treat cardiovascular disease, and we're starting to look at them to treat depression. So eat lots of salmon, tuna, haddock, sardines. That might be a dietary something people can do to prevent depression.
Exercise is wonderful.