Rhizome is rich in starch, protein, glucose, fat, carbohydrates, vitamins, as well as iron, calcium, phosphorus and many other minerals, in general, healthy adults in moderation usually do not exist harm. Commonly consumed rhizome benefits and hazards mainly include the following aspects: a. Benefits: 1, Chinese medicine perspective: from the perspective of Chinese medicine, rhizome is cool, sweet, has the effect of clearing heat and relieving summer heat, benefitting the spleen, removing annoyance and thirst, as well as lifting typhoid fever; 2, Western medicine perspective: from the perspective of Western medicine, rhizome is rich in nutritional value, can provide a variety of nutrients for the body, and also contains β-sitosterol, Ergosterol and other substances, the human body has certain benefits, and rhizome rich in starch and fiber, consumption has a certain sense of satiety, suitable for weight loss class people to eat. Second, the harm: 1, gastrointestinal tract stimulation: rhizome cold, not suitable for spleen deficiency diarrhea, may cause some stimulation of the gastrointestinal tract, aggravate the weakness of the spleen and stomach, may also cause bloating, abdominal pain, diarrhea, indigestion and other symptoms; 2, blood sugar rise: because rhizome contains a lot of starch, starch after body transformation may lead to abnormal blood sugar, when rhizome eaten too much may appear when the blood sugar rise and other problems 3, other: some people are used to eating raw rhizome with skin, or gnaw the skin down with the mouth, it is easy to poke themselves, in addition, if the cleaning, disinfection is not complete, it is easier to lead to bacterial, viral infections, is not conducive to gastrointestinal health, etc..