Phenex-1 Infant Formula Unflavored 417 ml Can Powder Amino Acid / Iron Phenylketonuria (PKU) - EachPhenylalanine free to allow greater intake of intact protein l tyrosine, an essential amino acid that is often deficient in infants with PKU li> L carnitine (20 mg 100 grams) and taurine (40 mg 100 grams) to help supply amounts normally found in human milk and foods of animal origin Approximately 40% of energy as fat to help achieve acceptable formula osmolality 6. 6% of energy as linoleic acid DHA and ARA to help support brain and eye development