XP Maxamum Unflavoured 30x 50g A food for special medical purposes. XP Maxamum is a phenylalanine free drink mix containing essential & non-essential amino acids, carbohydrate, vitamins, minerals & trace elements.XP Maxamum is for use in the dietary management of children over 8 years of age, & adults, including pregnant women, with proven phenylketonuria. The quantity of XP Maxamum should be determined by a clinician or a dietitian only & is dependent on the age, bodyweight & medical condition of the patient. The diet must be supplemented with natural protein & other nutrients in medically prescribed quantities to meet the phenylalanine & general nutrient requirements of the patient.