You can drink milk after fermentation if you have a bad stomach. Milk contains a lot of proteins, vitamins, and various minerals, and proper drinking of milk can replenish the human body's nutritional needs for a day, and milk also has the effect of protecting the gastric mucous membrane, and promoting the repair of the gastric mucous membrane. Some people have a bad stomach, it will be manifested as too little gastric acid secretion, these people will have indigestion phenomenon, it is best to drink milk in the milk fermentation before drinking. After the fermentation of milk, not only the nutrition has not disappeared, and the nutrients will be more easily absorbed by the body, but also has the effect of promoting the recovery of gastrointestinal function, improve indigestion. After fermentation, milk contains a lot of lactic acid bacteria, and lactose will be converted into glucose, so it also has the effect of protecting the gastric mucosa. People with a weak stomach drink milk, but also should pay attention to avoid drinking on an empty stomach, it is best to eat with pasta, so that the nutrients will not be wasted, such as bread, steamed buns, cookies and so on.