The basic building blocks of proteins are amino acids. There are over twenty different kinds of amino acids that make up the structure of proteins. Each amino acid contains a different number of carbons. That's why it's so different. Ten of these are called essential amino acids. These amino acids cannot be adequately synthesized by human metabolism. Therefore, it must be taken into the body through external nutrition. The human body cannot produce amino acids by itself. However, there is a need for amino acids, especially for the development of muscles. Of these, amino acids such as cysteine ​​and arginine are semi-essential amino acids for children. Because the metabolism in children to synthesize them is not yet fully developed.

Basic amino acids include lysine, histidine, thronine, methionine, valine, phenylalanine, leucine and isoleucine. Since these basic amino acids cannot be produced by the body, they should be taken by nutrition. Other amino acids are produced by the body itself.

When a nutrient containing protein is taken into the body, it breaks down in the stomach. This disintegration continues into the small intestine. The amino acids are divided into single, two and three groups. Single ones mix directly into the blood and are absorbed in the liver. After the liver, it re-enters the blood and disperses into the body or becomes another amino acid. Not all amino acids enter the structure of the protein.

Amino acids are important in animal nutrition. It increases the body weight of the animals, increases their appetite, increases the feed utilization rate, reduces the cost of feed and is effective against heat stress.

In the laboratories, amino acid analyzes are carried out within the scope of chemical tests and the standards prepared by domestic and foreign organizations are followed in these studies. The standard used in these studies is as follows:

• TS EN ISO 17180 Animal feed - Determination of lysine, methionine and thronine from commercial amino acid products and premixes