TYR sphere20, Red Berry flavor, 120 calories and 20 grams protein equivalent per 35 gram packet. TYR sphere20 is a powdered glycomacropeptide (GMP)-based low phenylalanine (36 mg per packet) and tyrosine (10.5 mg per packet) medical food for use in the dietary management of Tyrosinemia from 4 years of age. Use under medical supervision. Not for sole source of nutrition. Not for intravenous use. Enteral use only.