One reason why we gain weight is because we have low metabolism. When we have low metabolism, our vital functions are not maintained. It will be lowered making our body stores more fats rather than burning. There are ways to boost metabolism. One example is doing daily exercises to increase the muscles in the body. But if you want an easy way, go for dietary supplements that have special formulas to increase energy and the metabolic rate of the body. One that I heard lately was fenphedrine. Read the fenphedrine reviews to learn more about it.