Weight Loss Supplements are a far more mainstream area of the sports nutrition market - since many people from all walks of life are looking to burn fat and get lean. When referring to weight loss supplements, what we are usually referring to are 'thermogenic supplements' like Xenadrine or Isatori Lean System 7. Thermogenics work by raising the core body temperature and thereby increasing the metabolic rate, in turn burning more calories. Other fat burners tend to be either fat metabolisers like LA Muscle Fat Stripper or carbohydrate and fat blockers like BSN Cheaters Relief.