The recommended dosage and timing of intake of PK Aid-4 is dependent on the age, bodyweight and medical condition of the patient, and should be determined by a dietitian or clinician only. The recommended dilution is 1 to 20 (i.e. 5g of PK Aid-4 plus 100mls of water). To prepare, add a small amount of PK-Aid 4 and stir with a fork until a smooth paste is obtained. Continue stirring whilst adding the remaining volume of water. PK-Aid-4 can be taken as a chilled drink, stir again prior to serving. It can also be taken as a paste, additional water or diluted drinks must be consumed at the same time. PK-Aid 4 can be used as part of a modular feed or added as an amino acid supplement to PKU Anamix Infant in the later stages of weaning. PK-Aid 4 may be also flavoured with a separate flavour from the Nutricia flavour range. Please note flavouring is not recommended for infants less than six months. When preparing any infant feed, please follow the guidelines below:1. Wash hands thoroughly and clean the preparation area. Sterilise the bottles and teats (if using).2. Boil fresh water for five minutes and allow to cool for at least 30 minutes so that it feels warm to the wrist. Pour the required amount of water into a sterilised feeding bottle.3. Fill the scoop provided with infant formula and level off with a clean dry knife. Do not press the powder into the scoop. Only use the scoop provided.4. Add the prescribed number of scoops of infant formula to the water. Replace cap on the bottle and shake until powder is dissolved. Before feeding, ensure the formula is at the correct temperature by placing a few drops on the wrist.5. Formula remaining in the bottle after one hour of feeding should be discarded. Formula must not be rewarmed during feeding. Scoop Weight: 1 level scoop provides 5g of powder.