The majority of people have a problem with weight. There are billions of people who are overweight or obese, and many of them are either starting, in the middle of, or giving up on a diet at the start of every day. Because weight is one of the most important health risks for a number of conditions, it is important to make sure that everything that can possibly be done is. While some weight gain or inability to lose weight may be linked to medical conditions, it is often more likely a problem related to diet and/or lack of exercise. Of course, there is the age old excuse that some people love to give for their weight gain: slow metabolism.