Yam bean is a little germinated and edible. Yam bean, like potatoes, will start to germinate and grow if it is stored for a long time with proper temperature and humidity. However, yam bean's buds do not produce the same toxic substances as Solanum nigrum, which is harmless to human body after eating, so yam bean can be eaten after germination. However, it should be noted that yam bean began to germinate, indicating that yam bean has begun a new life process, and the nutrients in it will be absorbed by the buds and stems, which will lead to a decline in the nutritional value of yam bean, which is not as beneficial as fresh yam bean.