Biochemical criteria for a balanced diet?

The diet should contain all the nutrients and vitamins necessary for our body. Moreover, certain proportions and norms of these substances must be observed. For example – we must get all the amino acids our body needs. We can get them by eating certain plant or animal foods. If the diet is balanced, then our body does not suffer from various problems associated with a lack or excess of certain substances, normal regulation of various organ systems is carried out, and so on.