Multi-vitamins, mineral supplements and essential fatty acids (EFA's) like omega-3 fatty acids and conjugated linoleic acid (CLA) line the shelves of our stores and supermarkets. It is estimated that consumers spend $20 billion every year on supplements of all kinds, but research shows that many of these pills are not only useless, but may be dangerous. Some supplements are very good for women: iron and calcium being foremost and EFA's such as omega-3 fatty acids coming in a very close second. Before adding supplements to your regiment, you should analyze your diet over at least a week to make sure you actually need the supplement. Then, consult your doctor for proper nutritional guidelines.