Many nutrients can't be given by plant foods, while animal foods are rich in fat-soluble vitamins, such as vitamin A, vitamin D, vitamin B 12, vitamin E and so on. Moreover, some essential amino acids are less in plant foods, while animal foods are rich in proline and lysine. In addition, high-quality people are easy to lack minerals such as protein, iron, zinc and calcium, especially protein. In addition, many people may think that vegetables are also rich in iron, such as spinach and amaranth. The iron in plants belongs to non-heme iron, and its absorption rate and bioavailability are very low, about 2-20%. The iron in animal food belongs to heme iron, and its bioavailability is very high, about 65,438+05%-35%. Therefore, the intake of animal food is also necessary.

In fact, pork, beef, chicken and fish are all high-protein foods like eggs, milk and soybeans. Its high-quality protein contains a proper proportion of various amino acids, which can be almost completely absorbed and utilized after entering the human body. From the point of view of nutrition, the main purpose of eating meat is to make people get high-quality protein. Because of the normal maintenance of muscles in our bodies, we need these protein; The maintenance of various tissues of the body is also inseparable from these protein; Various enzymes in human body are mainly composed of protein, and protein is indispensable for them to play their normal physiological functions and maintain metabolic renewal.