Iron stick yam sprouted but not serious, and not accompanied by mold, has not yet produced toxins, just dig out the sprouted part, the remaining part can continue to eat, but because the iron stick yam in the sprouting process will consume part of the nutrients, and placed too long, the nutritional value will be reduced. If the iron stick yam sprouting serious, the whole becomes black or black-red, may also be accompanied by a slight mold, then it is not recommended to continue to eat, after eating such iron stick yam may lead to food poisoning. Iron stick yam has the effect of nourishing the spleen and stomach, benefitting the qi and nourishing the yin. With age, the body functions of the elderly will gradually degenerate, may appear waist and knee weakness, increased urination and other uncomfortable symptoms, appropriate consumption of some iron stick yam can help improve these symptoms. And the mucopolysaccharide contained in the iron stick yam has a very good effect on insulin sensitivity, which can help diabetic patients to play an auxiliary role in lowering blood sugar. However, people who are allergic to iron stick yam are prohibited from eating it. In addition, people with chronic constipation should also limit consumption, because iron stick yam has an astringent antidiarrheal effect, the consumption of constipation will aggravate the situation. Indigestion with bloating people should also be limited consumption, iron stick yam dietary fiber content is high, too much consumption is not easy to digest, will cause a burden on the gastrointestinal tract. In addition, it is recommended to store the iron stick yam in a cool, dry place to prevent sprouting. In daily life, it is still recommended to eat more fresh vegetables and fruits, which are richer in nutrients and beneficial to health.