The protein content of wheat germ is as high as 30%, which is second only to soybean and 4.9 times and 3.2 times that of rice and flour respectively. Compared with the animal food with high content in protein, the protein content of lean beef, lean pork and eggs is 1.5 times, 1.8 times and 2./kloc-0 times respectively. In the composition of wheat germ protein, albumin accounts for 30.2%, α, β and δ globulin accounts for 18.9%, gliadin accounts for 14.0%, glutenin accounts for 0.3%~0.37%, and water-soluble protein accounts for 30.2%. The non-protein nitrogen content is11.3% ~15.3%, and the main components are asparagine, betaine, choline, lecithin, allantoin and arginine. The composition of nucleic acid contains 3.5%~4.2% ribonucleic acid RNA, which is the same as yeast.

Wheat germ protein is a complete protein. It contains 8 essential amino acids, accounting for 34.7% of the total amino acids. Especially in amino acids, methionine accounts for 2% and histidine accounts for 2.5%. The content of lysine, the first human limiting amino acid that can effectively promote children's growth and development, is as high as 18.5g/kg, which is much higher than that of rice and flour. Moreover, the mutual ratio of essential amino acids in wheat germ protein is basically close to the model value promulgated by FAO/WTO, and the amino acid composition ratio of soybean, beef and egg is obviously better than that of rice and flour protein, which has a good effect of balancing amino acids and is of great significance in nutrition. The fat content of wheat germ can exceed 10%[9, 17, 18]. Unsaturated fatty acids account for 84% (linoleic acid 52.3 1%, oleic acid 28. 14%, linolenic acid 3.55%), palmitic acid 9 1%, followed by stearic acid, and phospholipids (mainly cephalin and lecithin) and 4%.

From the point of view of nutrition, the composition of wheat germ oil is very ideal. Wheat germ oil is a kind of high-quality plant fatty acid, 84% of which is unsaturated fatty acid beneficial to human body, especially linoleic acid, which is the most important of the three essential fatty acids for human body, accounting for more than one tenth of the whole wheat germ oil. It can react with cholesterol in human blood vessels and prevent arteriosclerosis. It has certain effects on regulating human blood pressure, lowering blood cholesterol, relieving muscle fatigue and pain, enhancing explosive force and endurance, and preventing diabetes. Therefore, the therapeutic value of wheat germ oil is remarkable, and it is indeed an ideal nutritional oil. Wheat germ is rich in minerals such as magnesium, phosphorus, potassium, zinc, iron and manganese. , which is necessary for human body, has a comprehensive variety, especially the trace element selenium is higher than other foods. These mineral elements play an important role in maintaining human health, especially in promoting children's growth and development. Therefore, wheat germ is a good source of natural mineral elements. Wheat germ also contains high carbohydrate, the content is as high as 47%. Among them, hemicellulose 15.3%, cellulose 16.9%, starch 310.5%, sugar 36.3% (sucrose 55.9%, rhamnose 38. 1%, fructose 2.8% and glucose 2./kloc). Wheat germ contains 2% ~ 3% dietary fiber, which can reduce the cholesterol content in blood and deepen the memory of cerebral cortex. Wheat germ also contains 22, 25, 26, 28 and other enols. These higher alcohols have certain effects on improving the collective basal metabolic rate, reaction time, reflexivity, sensitivity, muscle function, enhancing the body's heart load function, enhancing physical strength, endurance and explosive force, among which octacosanol has attracted much attention because of its various physiological activities.