Hi, it is very frequently heard if you want to loose weight you must diet and exercise. Obviously it is right but diet pills should also aid in weight loss. The reason I say this is because with exercise, you are to get your heart rate up to a certain amount to increase the amount of calories burned. You're told to do this, and keep it at that rate while you are exercising. Diet pills containing certain herbal supplements increase your heart rate. Many people say diet pills don't work, but then you tell how to exercise and increase your heart rate to burn more calories?