Fat Burners have the POTENTIAL to help you lose unwanted body fat. They contain a wide-range of ingredients from energy & mood enhancers to appetite suppressants and fat metabolizes. Most are designed to be taken prior to working out, encouraging your body to burn off and utilize stored body fat when training.
Because of this, they are more designed for cardio / weight loss goal orientated workouts. Each fat burner will vary in terms of total caffeine content too so please ensure you read the nutritional labels prior to taking it!