1, autumn beans mature, which contains a toxic protein "lectin", which is the most abundant in mature and older beans. In addition, some bean skins contain hemolysin, which are the causes of poisoning.

2. After eating beans with a large amount of poison, symptoms such as nausea, vomiting, stomachache and dizziness generally appear in about 3 hours, and soon return to normal after vomiting.

3. The "lectin" can be destroyed when the beans are boiled or heated for 10 minutes or more. Therefore, if you eat fried beans or use them as stuffing, you should fully heat them, and you should not eat immature beans.