Good news! You can eat dark chocolate that contains at least 70 percent cocoa to combat depression! The chemicals in dark chocolate release seratonin, a brain chemical that helps maintain mood and balance. Studies show that eating 1 to 2 ounces of dark chocolate a day over the course of two weeks can improve your mood. (But don’t go overboard—chocolate is high in calories!) Get your fix with a piece of Chocolate Lover’s Pizza.