Wild yam is a perennial twining herbaceous vine with a flowering period from June to August and a fruiting period from August to October. It grows on forest edges on hillsides, under shrubs and along ditches. Mainly produced in Liaoning, Jilin, Heilongjiang, Hebei, Inner Mongolia, Shanxi and Shaanxi. It is warm in nature, sweet and bitter in taste. It can relax muscles and activate blood circulation, relieve cough and reduce phlegm, expel wind and relieve pain. It is used for waist and leg pain, rheumatic pain, rheumatic joint pain, numbness of muscles and bones, Kashin-Beck disease, bruises, flashbacks, coughing and wheezing, tracheitis, and bronchitis. Pharmacological studies show that it has antitussive and asthma effects.

It can be eaten by frying, cooking, distilling sugar, etc. The finished product is used as medicine and is called Huaiyam.

Each 100 grams of fresh yam contains 82.6 grams of water, 1.5 grams of protein, 14.4 grams of carbohydrates, 14 mg of calcium, and 42 grams of phosphorus.

mg, iron 0.3 mg, carotene 0.02 mg, vitamin B10.08 mg, vitamin B20.02 mg, niacin 0.3 mg, vitamin C4 mg. It also contains a large amount of nutrients such as fiber, choline and mucus. Yams can promote the phagocytosis function of white blood cells. Eating yam can also supply a large amount of mucus protein to the human body, which can prevent fat deposition in the cardiovascular system, maintain blood vessel elasticity, prevent premature atherosclerosis, reduce subcutaneous fat deposition, and avoid obesity; It can also prevent connective tissue atrophy in the liver and kidneys and prevent collagen disease. The mucus polysaccharides of yam combined with inorganic salts can form bone and make cartilage have a certain elasticity. Yams contain digestive enzymes that can promote the decomposition of protein and starch. They are nutritional supplements for patients with physical weakness, loss of appetite, indigestion, diabetes and other diseases.

Yam has a sweet and mild taste, and has the effects of strengthening the spleen, nourishing the lungs, strengthening the kidneys, and replenishing the essence. Treats diarrhea due to spleen deficiency, chronic dysentery, fatigue cough, thirst, spermatorrhea, leucorrhea, frequent urination, etc. "Shen Nong's Materia Medica" records that it "maintains the damage to the middle, tonifies deficiency, removes cold and heat evil, tonifies the middle and replenishes qi, builds muscles, and long-term use improves ears and eyesight." "Treatise on the Properties of Medicine" records that "it can replenish the five kinds of fatigue and seven injuries, remove air-conditioning, relieve low back pain, calm the mind and spirit, and replenish the heart qi deficiency. If the body is weak, use it in addition." "Rihuazi Materia Medica" records that "it can help the five internal organs, strengthen the muscles and bones, It calms the mind and calms the mind, and relieves forgetfulness."

Small tubers grow on the yam stems and vines, also known as yam beans and bulbils. Their edible effects are the same as those of yam.

Note: Do not use if there is any real evil.