groups a , b , c , and d received 0 % , 1 % , 2 % , and 4 % , respectively , of total energy intake as arginine given in the form of crystalline arginine hydrochloride with 22 % , 21 % , 20 % , and 18 % , respectively , of total energy as whey protein .
C0003765
arginine
C0301556
arginine hydrochloride