Natto is a kind of food made from soybean, which contains many beneficial ingredients such as Bacillus natto and nattokinase, and has certain dietotherapy effect on intestinal flora. Bacillus subtilis natto can adjust the balance of intestinal bacteria, inhibit harmful bacteria in the stomach, and treat constipation, enteritis and diarrhea. The sticky substance caused by natto alcohol is covered on the surface of digestive tract mucosa, which can reasonably maintain the stomach and intestines.

There are two reasons for the exhaust pipe: first, if natto is tried soon, natto bacteria will fight against harmful bacteria in the stomach, and steam will be discharged during the whole process; Second, it is possible that natto is not so good, and the digestibility of bean food without alcohol is low, but it will cause poor steam.