Therefore dietary staples include Low-protein natural foods (eg, fruits, vegetables, certain cereals) Protein hydrolysates treated to remove phenylalanine Phenylalanine-free elemental amino acid mixtures Examples of commercially available phenylalanine-free products include PKU Anamix ® (for infants), XPhe Maxamaid ® (for children 1 to 8 years), XP Maxamum ® (for children > 8 years); Phenex ® - 1 and Phenex ® - 2; Phenyl-Free ® 1 and Phenyl-Free ® 2; PhenylAde ® (varieties); PKU Lophlex ® LQ; and Phlexy-10 ® (multiple formulations).