Amino acid (AA) is the main component of proteins. Changes in levels of plasma AA concentration have been mentioned in some cases such as plasma AA concentrations in chronic kidney disease (CKD) patients are low when inflammation status increases [1] or patients with short bowel syndrome (SBS) undergoing total parenteral nutrition (TPN) have decreasing concentrations of essential amino acids (EAA), increasing rate of malnutrition and complications while for those undergoing part of parenteral nutrition (PN), there was just a decrease in concentrations of two branched chain amino acids, leucin, valine, cysteine, and tyrosine [2].