Yes, all our proteins have the natural amount of the essential amino acid (EAA) phenylalanine that comes with a complete whey protein. Whey protein, which is the protein in Pre/Post workout, contains the following essential amino acid profile measured in mg/g of protein: leucine, 105 mg; lysine, 93 mg; Phenylalanine plus tyrosine, 43.5 mg; cysteine, 21 mg; isoleucine, 63 mg; valine, 58 mg; threonine, 69 mg, tryptophan, 18 mg; histidine, 17 mg. Over 60 percent of the total protein in whey are EAA.