Soybean is the yellow seed of leguminous plant soybean and the "king of beans". Soybean is sweet in taste and flat in nature, and belongs to spleen, stomach and large intestine meridians. It contains about 40% protein, which is comparable to animal protein in quantity and quality, so soybean has the reputation of "vegetable meat" and "green cow". Protein of soybean contains complete essential amino acids, especially lysine, which just supplements the shortage of lysine in cereals, while methionine lacking in soybeans can be supplemented by cereals. Therefore, our people have been mixing whole grains and beans to make proteins complementary, which has certain scientific reasons. The fat content of soybean is 18-20%. Compared with animal fat, it contains less cholesterol, but is rich in linseed oleic acid and linseed oil dilute acid. These unsaturated fatty acids make soybeans have the function of lowering cholesterol. Lecithin is also more, which is of great significance to the development of the nervous system. Every100g of soybean contains about 367 mg of calcium and 57 1 mg of phosphorus, which is suitable for preventing rickets in children and the elderly who are prone to decalcification of bones, and is also beneficial to neurasthenia and physical weakness. Every100g of soybean contains 1 1 mg of iron, which is not only rich in content but also easily absorbed by human body, so it is extremely beneficial to growing children and patients with iron deficiency anemia. In addition, there are inorganic salts such as potassium and sodium and some trace elements necessary for human body. Soybean fiber is rich in saponins, which can reduce cholesterol in the body. According to Australian researchers, cholic acid secreted by human body for digesting fat is synthesized by cholesterol in liver, and dietary fiber containing saponin can absorb cholic acid and excrete it with feces. The consumption of cholic acid must be compensated by using cholesterol in the body, thus promoting cholesterol metabolism, which not only helps to reduce cholesterol deposition, but also indirectly protects heart health. The nutritional advantages of soybean determine its medicinal value. Our ancestors have discovered this. For example, in Shennong Herbal Classic written by people in the Han Dynasty under the guise of Shennong, soybean has been listed as a product of China, and it is pointed out that its function can cure carbuncle and relieve pain. Liang Dynasty's "Bielu of Famous Doctors" said that soybean can "promote diuresis to reduce swelling, remove stomach heat and depression, drench dew, lower blood stasis, disperse five internal organs, accumulate internal cold" and so on. Li Shizhen in the Ming Dynasty pointed out that soybean "cures kidney disease, benefits underwater qi, controls wind and heat, and promotes blood circulation and detoxifies." At the same time, Fang Yun said in the secret record of prolonging the year, "eat soybeans": five liters of soybeans, if used as a sauce method, take yellow and pound it into powder, and paste it with pig fat, which is as big as a ball. Take 50 ~ 100 capsules each time with warm wine. It can make people "grow skin, benefit qi and color, replenish bone marrow, increase strength, replenish deficiency and eat." Huang Gongxiu's "Seeking Truth from Materia Medica" has a very accurate exposition: "Yellow soybeans, according to the book, are sweet and will cause phlegm and cough; It is also said that the middle qi relieves depression, benefits the large intestine, and benefits the water to reduce swelling. This seems to be a dichotomy. I don't know if the book is slow, but I don't vent when I cook it; The words in the book are lenient to help the intestines, which means cold but not cooked. Everything is born rare, and taking more is harmful. Therefore, beans must be cooked raw, and the treatment has a reinforcing and reducing ear. If you use tonic, you must fake it and fry it. However, it is advisable to eat less. If you take too much, you will see the disadvantages of phlegm, suffocation and cough. " Medicated diet prescription: 1, soybean skin soup: 200 grams of soybean skin, decocted in water three times, one dose a day. Treat constipation or habitual constipation. 2, bean skin charcoal: bean skin fried charcoal grinding, 3-9 grams each time, twice a day, boiled water. Treat diarrhea. Attachment: Soybean sprouts. Fresh soybean sprouts are sweet, cold and non-toxic, while dry soybean sprouts are sweet and flat. Enter spleen, stomach and bladder meridian. Diuresis, clearing away summer heat, and dredging pulse. Can be used for summer dampness, damp temperature, fever, body weight, chest tightness, damp arthralgia, edema, etc.