Phenylade GMP 33.3g Pouch Vanilla, 132 Calories Per Pouch. A powdered medical food, low in phenylalanine containing a balanced mix of glycomacropeptide (GMP), essential and non-essential amino acids, carbohydrates (including fiber), fat (including docosahexaenoic acid (DHA)), 10 grams protein equivalent, vitamins, minerals and trace elements. For the dietary management of proven Phenylketonuria (PKU) in individuals over 1 year of age.