Milk should not be drunk after the expiration date. Milk shelf life is the best time to drink milk, more than the shelf life, the nutritional value of milk will be reduced, but also breeding a lot of bacteria, on the human body health to cause some impact. Especially sensitive gastrointestinal tract, drinking expired milk will appear abdominal pain, diarrhea and other gastrointestinal reactions. If the milk has changed flavor, precipitation or other spoilage phenomenon, even if it is not out of the shelf life, you can not drink. Drinking spoiled milk can cause gastrointestinal reactions such as abdominal pain and diarrhea, and in severe cases, hospitalization is necessary. Milk should be kept at the right temperature and in the right environment and should be consumed within its shelf life. When milk expires, it is recommended not to drink it. Not only the nutritional value intake is less, but it will also have an effect on the body.