Protein is the material basis of life. Without protein, there is no life. Therefore, it is a substance closely related to life and various forms of life activities. Protein is involved in every cell and all important components in the body. Protein accounts for 16% to 20% of the body’s weight, that means a 60kg adult has about 9.6~12kg of protein in the body. There are many kinds of proteins in the human body, and their properties and functions are different. However, they are composed of more than 20 kinds of amino acids in different proportions, and are continuously metabolized and renewed in the body.
- Nuts and seeds
Nuts and seeds are the essence of plants. They are generally nutritious and contain high levels of protein, oil, minerals and vitamins. They have excellent effects on human growth and development, physical fitness and disease prevention.
- Yoghourt, milk and soybean milk
Milk is one of the oldest natural drinks and is known as “white blood”. The importance of the human body can be imagined. The main ingredients are water, fat, phospholipids, protein, lactose, inorganic salts and so on.
In the fermentation process, yoghurt is hydrolyzed into small molecules of about 20% of sugar and protein in milk, and the fat content in milk is generally 3%-5%. After fermentation, the fatty acids in the milk can be increased by 2 times compared with the raw milk. These changes make the yogurt more digestible and absorbable, and the utilization rate of various nutrients is improved.
Soymilk is a favorite drink of the Chinese people. It is also a kind of high nutritious food for all ages. It enjoys the reputation of ”plant milk” in Europe and America. Soymilk is rich in vegetable protein and phospholipids, and also contains vitamins B1, B2 and niacin.
- Various beans
There are many varieties of beans. They can be divided into two broad categories based on the type and amount of nutrients in the beans. Legume is characterized by high levels of carbohydrates, such as mung beans and red beans. Fresh beans and soy products can not only be used as dishes, but also as raw materials for condiments.
- Fish meat
Fish is lean meat, 100 grams of fish contains less than 2 grams of fat, even the most greasy Norwegian salmon, which contains less than half the calories. Fish is also an important source of protein. Fish is easily absorbed by the body, and 100 grams of fish is half the protein required by the body every day.