Some people say that grapes are not, because they contain poly-mildew acid to promote the metabolic rate of the body, and women eat grapes to tighten and resist aging. Grapes are rich in nutrition. According to scientific analysis, they contain more than a dozen amino acids such as glutamic acid, arginine and tryptophan, which are indispensable to the human body. Therefore, eating some grapes often is of great benefit to the normal activities of the nervous system and cardiovascular system, and can prolong life. The ancients also said: "Long-term eating (grapes) is not old." Grape has high nutritional value, and grape juice is praised as "plant milk" by scientists. The sugar content of grapes is about10%-25%, and the highest can reach about 30. Among the more sugar contained in grapes, most of them are glucose which can be directly absorbed by human body, so grapes become an ideal fruit with weak digestive ability. Grapes contain more tartaric acid, which is more helpful for digestion. Eating more grapes properly can strengthen the spleen and stomach, which is of great benefit to the body. Medical research has proved that grape juice is the best food for patients with inflammation, which can reduce the contents of protein and sodium chloride in blood. Grape juice has an auxiliary effect on the rehabilitation of weak patients, patients with arteriosclerosis and nephritis, and the incidence of cancer is also significantly reduced in places where grapes are planted and eaten more. Grape is the fruit with the most complex iron element, and it is a nutritious food for anemia patients. Eating grapes regularly is beneficial to neurasthenia and fatigue. After the grapes are dried, the contents of sugar and iron are relatively increased, which is a good tonic for children, women and people with asthenia and anemia.