The following hazards can not drink milk on an empty stomach: 1, fasting milk will lead to milk can not be well enzymatic, the protein in milk will be converted into energy consumed by the body, the body will not be able to absorb the rich nutrients in milk. 2, fasting body lactase very little, if you drink milk gastrointestinal can not digest and absorb the lactose in milk in time, lactose will be broken down by bacteria in the gastrointestinal fermentation, and then produce a lot of 3, milk is rich in high-quality protein, not only can constitute the body of new tissue, but also repair the body’s original tissue. Drinking milk on an empty stomach will cause nutrients to be quickly discharged from the stomach and then consumed by the body as calories, so it causes nutrient loss. 4. Drinking milk on an empty stomach will cause unabsorbed amino acids and proteins to enter the large intestine from the small intestine, and then bacteria will break down and ferment the substances, producing many harmful substances that will burden the body.