Raspberry ketones, members of a group of nutrients called polyphenols, have been used for years to add flavour and smell foods.Based on early research in mice, some researchers speculate that raspberry ketones may increase the body\'s production of a substance called adiponectin. Adiponectin is produced by fat cells - when in balance, it regulates appetite and ensures that calories are metabolised properly rather than being stored as fat.Not suitable for women who are breast feeding