D-Mannose is a simple sugar which naturally occurs in the body. It is also commonly found in Cranberry. D-mannose is mainly used for preventing urinary tract infections (UTIs) and works by preventing certain kinds of bacteria from sticking to the walls of the urinary tract and causing infection. Taking D-Mannose in tablet form obviously provides a much higher dose than would be naturally found in food, or in cranberry supplements. For this reason, D-Mannose has gained a lot of popularity as a food supplement. Vegetarian & Vegan No artificial colours or flavours. Free From: GM, dairy, lactose, gluten, wheat, yeast, soya, salt and sugar.