Fat Burners are also widely used not only by those cutting for competition, but for those seeking to lose weight. These supplements increase your metabolic rate using a host of thermogenic ingredients which in turn allows you to burn a greater number of calories during the day. The more calories you burn, the easier you can enter a state of calorie deficit, where you are burning more calories than you consume. This will allow you to use existing energy stores as energy, resulting in weight loss. Fat burners also assist in the breakdown of stored sources of body fat, which allow these to be used with greater ease as the body's preferred source of fuel. Fat Metabolizers are often included in many Fat Burner supplements on the market, or can be purchased on their own, which work by transporting stored body fats into muscle cells to be used as fuel. Fat Burners can be taken in the morning upon rising, in the afternoon and as a Pre-Workout for an added energy kick.