PhenylAde GMP ULTRA, Plain, 1.18 oz. (33.4g). 107 Calories Per Carton. 16 Cartons Per Case.PhenylAde GMP ULTRA is a powdered medical food, low in phenylalanine proving protein from glycomacropeptide (GMP) and amino acids with other nutrients for the dietary management of phenylktonuria (PKU) in individuals over 3 years of age.