Recombinant Human Serum Albumin (rHSA) is an active compound and possesses an identical conformation to plasma derived HSA. Recombinant Human Serum Albumin (rHSA) has no difference between rHSA and plasma derived HSA. The main physiological function of Recombinant Human Serum Albumin (rHSA) is to regulate plasma pH and maintain plasma osmotic pressure[1].