With Valentine's Day this week, many of us are thinking of chocolate. And there is good news for chocoholics. Studies have shown that eating chocolate can cut your risk of heart problems by one-third. However, read on! The chocolate you eat should be high in cacao content - at least 70%. And you should limit your chocolate indulgences to no more than two ounces a day, especially if weight is a problems for you. Remember that excess body weight is a big contributor to heart disease.