d-Tagatose is a ketohexose, which presents unique properties as a low-calorie functional sweetener possessing a sweet flavor profile similar to d-sucrose and having no aftertaste. Considered a generally recognized as safe (GRAS) substance by FAO/ WHO, d-tagatose can be used as an intermediate for the synthesis of other optically active compounds as well as an additive in detergent, cosmetic, and pharmaceutical ...