It’s not true that there are three types of people who can’t eat yam beans. Yam beans are rich in mucus protein, with skin irritating saponin, phytochemicals, for people with allergies, after consuming yam may appear allergies, numbness of the tongue, throat tightness and other symptoms, posing a threat to their health, so this category of people can not be eaten. In addition to those who are allergic to yam beans are prohibited from eating, other people can eat, but certain groups of people need to eat less at their discretion. For example, for people with gastrointestinal disorders, the consumption of yam beans will stimulate the stomach and intestines, aggravating the disease, so this group of people should eat less yam beans. In addition, the starch content in yam beans is higher than the average vegetable, for diabetic people should also eat less. It is recommended that the consumption of yam beans should be combined with their own physical condition, moderate consumption, for allergic people should be prohibited from eating.