Tylactin™ RTD 15 (15 grams of Protein Equivalent [PE]) is the first and only whole protein complete metabolic formula in a ready-to-drink form for the dietary management of TYR Types I, II, III. Tylactin™ RTD 15 original provides a neutral taste allowing to add flavoring or drink on its own. Tylactin™ RTD is medical food formula that contains Tylactin™, the proprietary, advanced formulation of glycomacropeptide and essential amino acids without added phenylalanine and tyrosine. Phenylalanine is not added because phenylalanine naturally converts into tyrosine.