1, beans should be removed before cooking, otherwise it will not only affect the taste but also be difficult to digest after cooking.

2. Because beans produce too much gas in the process of digestion and absorption, it is easy to cause abdominal distension, so people with abdominal distension, functional dyspepsia and chronic digestive system diseases should eat as little as possible.

3, beans should not be eaten raw or with raw food, and the cooking time should be long and not short, so as to ensure thorough cooking, otherwise it is easy to be poisoned.

4, people who are allergic to beans should not eat. Beans may also become allergens. If they are allergic to beans, eating beans may cause allergic symptoms such as redness, frequent diarrhea, indigestion, headache, sore throat and asthma, so such people should also avoid eating beans.

Beans should not be eaten raw and are easy to be poisoned. This is because beans contain trypsin inhibitor, hemagglutinin and hemolysin, which are irritating to cell membrane and can destroy red blood cells. If not handled properly, they can stimulate the gastrointestinal tract, cause local congestion, swelling and hemorrhagic inflammation of the gastrointestinal tract, cause agglutination and hemolysis of human red blood cells, and even cause hemolytic jaundice. However, once the beans are heated above 100℃, these toxic substances will deteriorate and disappear. Therefore, it is safe to ensure that the beans are cooked thoroughly.