Periflex Advance Powder Unflavored (6 x 454g) by Nutricia is a specialized medical food designed for the dietary management of Phenylketonuria (PKU), a rare genetic disorder impairing the metabolism of phenylalanine. This phenylalanine-free powdered formula supports older children (9+ years), adolescents, adults, and women of childbearing age, including pregnant women, requiring controlled phenylalanine intake. It provides essential nutrients while enabling strict dietary management, helping maintain appropriate amino acid levels and preventing complications associated with PKU. This unflavored powder offers versatile use in personalized nutrition plans tailored to clinical needs.