Human body needs 20 amino acids. Out of 20 it manufactures 11 only and rest is taken from outside by amino acid supplements. Are these supplements really necessary? Of course they are. In fact amino acids are the source of proteins, the building blocks of human body. 13 amino acids taken in the form of supplements does not refer to the fact that they are non essential. They are as essential as the other 9 amino acids that are manufactured by the human body itself. These 9 amino acids are found in the plant and animal bodies and they are the sources which are consumed by the human organism to fulfill the need of these acids. In addition to taking plant and animal proteins some people prefer to take them in the form of supplements which is not a bad decision. read more...