PKU explore10, Raspberry, 25 g Packet. 83 calories per 25 g packet.A Powdered Phenylalanine-free Medical Food for the dietary management of Phenylketonuria. A blend of essential and non-essential amino acids, carbohydrate, arachidonic acid (ARA), docosahexaenoic acid (DHA), vitamins and minerals. Designed to form a semi-solid (spoonable) consistency when mixed with water to support introduction of solids in the PKU diet of young children from 1 year of age.