yogourt or yoghourt, is a food produced by bacterial unquietness ofmilk.The bacteria used to make yogurt are known as yogurt societies. Unquietness of sugars in the milk by these bacteria produces lactic acid, which acts on milk protein to give yogurt its texture and characteristic streetwalker flavor. Cow's milk is the milk most ordinarily used to make yogurt. Milk from water buffalo, scapegoats, ewes, mares, camels, yaks and works milks are also used to produce yogurt. The milk used may be homogenized or not. It may be pasteurized or raw. Each type of milk produces generally different results.