Hu Aishan is also known as yam, yam, bamboo tree, salt dynasty, potato medicine and potato. Yam is the tuber of Dioscorea opposita, a perennial herb of Dioscoreaceae. Growers call it domestic yam and wild yam; Chinese herbal medicines include Chinese yam and Chinese yam. Because of its rich nutrition, it has been regarded as a good tonic with good quality and low price since ancient times. Can be used as staple food, vegetables, and snacks such as candied haws. China is mainly produced in Bo 'ai, Qinyang, Wuzhi, wen county and other places in Henan Province, and also cultivated in Hebei, Shanxi, Shandong, Central South and Southwest China. After the stems and leaves wither in winter, dig, cut off the roots, wash and dry. There are two main kinds of yam cultivated in China: common yam and sweet potato. Common yam tuber is smaller, among which "Jiaoban Potato" in Sichuan and other places, Huai Yam in Huai County of Shaanxi Province and Huai Yam in Cheng Nan of Jianghan are the most famous. Nutritional value 1. Spleen and stomach, digestion: Yam contains amylase, polyphenol oxidase and other substances, which is beneficial to the digestion and absorption function of the spleen and stomach and is a dual-purpose product for medicine and food. Both spleen yang deficiency and stomach yin deficiency can be eaten. Clinically, it is often used to treat spleen and stomach weakness, anorexia, fatigue, diarrhea and other diseases; 2. Tonifying kidney and replenishing essence: Yam contains a variety of nutrients, which has the functions of strengthening the body, tonifying kidney and replenishing essence. Generally, it is kidney deficiency, nocturnal emission, frequent urination and other symptoms. Can be taken; 3. Benefiting lung and relieving cough: Yam contains saponin and mucus, which has the function of lubricating and moistening dryness, so it can benefit lung qi, nourish lung yin and treat lung deficiency, excessive phlegm and chronic cough; 4. Lowering blood sugar: Yam contains mucin, which has the function of lowering blood sugar, can be used to treat diabetes, and is a good diet for diabetics; 5. Longevity: Yam contains a lot of mucin, vitamins and trace elements, which can effectively prevent the deposition of blood lipids on the blood vessel wall, prevent heart disease, and achieve the effects of benefiting the heart and calming the nerves and prolonging life; 6. Anti-hepatic coma: In recent years, it has been found that yam has sedative effect and can be used for anti-hepatic coma. Applicable people 1. Suitable for diabetes, abdominal distension, physical weakness after illness, chronic nephritis and long-term diarrhea; 2. Yam has astringent effect, and people with dry stools should not eat it; In addition, evil spirits should not eat yam. Precautions: yam and kansui should not be eaten together; Nor should it be taken with alkaline drugs. Usage and dosage: 1. Yam should be soaked in salt water immediately after slicing to prevent oxidation and blackening. 2. When fresh yam is cut, it will have mucus, which is easy to slip and hurt your hands. You can wash it with water and a little vinegar first, which can reduce mucus. 3. Yam is delicate in texture and sweet in taste. However, the skin of yam is easy to cause skin allergy, so it is best to peel it, and don't touch it with your hands after peeling it. Wash your hands several times at once, or you will scratch. 4. Good yam skin is harmless, with mucus, white fault, more mucus and less water. The skin can be fried or dried to make soup or porridge. Peel and eat to avoid abnormal taste such as tingling. 5. Fresh yam is mostly used for fatigue cough and diabetes, and fried cooked food is used to treat spleen and stomach and kidney deficiency. Edible efficacy Yam is sweet and flat, and enters the lung, spleen and kidney meridians; Do not be bored; Has the effects of invigorating spleen and lung, invigorating stomach and kidney, consolidating kidney and nourishing essence, improving hearing and eyesight, helping five internal organs, strengthening bones and muscles, calming nerves and prolonging life; Indications: spleen and stomach weakness, listlessness, anorexia, chronic diarrhea, lung qi deficiency and dryness, cough with excessive phlegm, kidney qi deficiency, soreness of waist and knees, weakness of lower limbs, thirst and frequent urination, nocturnal emission and premature ejaculation, leukorrhagia, skin swelling and obesity. Tip 1. Tonifying the spleen and stomach: treat spleen and stomach weakness, diarrhea, physical weakness, eating less and sweating more. 2. Benefiting lung and nourishing kidney: this product is cold and not dry, and it tastes sweet and moist. Can be used for treating thirst, nocturnal emission and leukorrhagia caused by deficiency of both lung and kidney.