PK Aid 4 500gPK Aid-4 is a phenylalanine free unflavoured blend of essential and non-essential amino acids. PK Aid-4 can be used in infants, children and adults for the dietary management of proven phenylketonuria (PKU). A source of vitamins, minerals and trace elements is required (e.g. Phlexy-Vits).Use under medical supervision. Not for parenteral use. Not suitable for use as a sole source of nutrition. These products should not be used as a sole source of protein but must be given in conjunction with a protein source, to supply the phenylalanine, fluid and general nutrition requirements of the patient in quantities as prescribed by a clinician or dietitian. Only intended for use by patients with PKU.