Soybean is one of the main crops in China, because it has the characteristics of both edible oil resources and edible protein resources, and has high nutritional value. Soybean protein is the most abundant protein in nature, and its amino acid composition and essential amino acids The composition is similar, and it is also rich in calcium, phosphorus, iron, oligosaccharides and various vitamins. It is known as the “growth of gold”. Industrialized soy protein products include soy protein powder (SF), soy protein concentrate (SPC), soy protein isolate (SPI) and textured soy protein (TSP).
FAO/WHO (1985) human test results show that the essential amino acid composition of soy protein is more suitable for human needs. For people over two years old, the physiological potency of soy protein is 100. Soybean is rich in protein, and its protein content is almost twice that of meat, eggs, and fish. Moreover, the protein contained in soybeans contains sufficient human body “essential amino acids” and complete components, which are “high-quality protein”. The human body’s demand for protein varies with age, gender, weight, type of work, etc. In order to guide people’s diet, countries around the world have formulated the “recommended daily dietary nutrient supply” (RDA) based on their own actual conditions. In 1999, the U.S. Food and Drug Administration (FDA) issued a statement: Daily intake of 25 grams of soy protein can reduce the risk of cardiovascular and cerebrovascular diseases.