PKU GMPro Ultra is a Food for Special Medical Purposes for use under medical supervision. PKU GMPro Ultra is a flavoured, nutritionally incomplete, low phenylalanine* powdered drink mix containing glycomacropeptide (GMP), with essential and non-essential amino acids, vitamins, minerals, trace elements and asmall amount of carbohydrate and fat. With sugars and sweeteners. PKU GMPro Ultra is available in two flavours, vanilla and lemonade, in 30 x 33.4g sachets. *PKU GMPro Ultra contains 36.0mg of phenylalanine per 33.4g sachet. This should be taken into consideration as part of the patient’s overall dietary intake. Protein substitutes based on GMP are a natural source of phenylalanine.