Amino acids are basic units of proteins that are responsible for the existence of all life form. Complete hydrolysis of the protein then yields amino acids. So far about 80 different naturally occurring amino acids have been found. Twenty-two amino acids are found in the human body, and they are separated into essential and non-essential amino acids. The essential amino acids can not be manufactured in our body, and thus need to be ingested; the non-essential amino acids can be made inside our body. ...