Lactase is a digestive enzyme used in dairy products, which is mainly found in the intestine and is medically known as beta-galactosidase. This enzyme converts the less sweet lactose into the sweeter glucose and galactose, which are monosaccharides helping to promote absorption in the gastrointestinal tract. Lactase is an odorless, tasteless white powder that dissolves into a light brown liquid. Lack of this enzyme in the body is called lactose intolerance, lack of this enzyme patients can not break down lactose, often leading to intestinal flora often imbalance and cause bloating, diarrhea and other symptoms, oral lactase tablets to improve the symptoms.