Arginine 2000 Oral Supplement Unflavored Powder 4 Gram Individual Packet (1137910_EA) 1/EAArginine200 is for those who have inborn errors of metabolism such as Urea Cycle Disorders; it's intended to use under strict medical supervision to provide the specific amounts of arginine unable to be achieved by dietary modification alone. 4 gram packet contains 14 calories, 1. 7 protein equivalent, 2,000 milligrams of L Arginine; 1. 9 total carbohydrate and no fat.