GA Powder, 2270 calories per 1 lb (454 g) can. GA is an iron-fortified infant formula and medical food powder that is free of the essential amino acids lysine and tryptophan for infants, children and adults with glutaric acidemia type 1. The product provides the other essential amino acids as well as nonessential amino acids, carbohydrate, fat, essential fatty acids, vitamins and minerals. Use under direct and continuing supervision of a doctor.