Tyrex Amino Acid-Modified Infant Formula

For infants diagnosed with tyrosinemia, ordinary formula isn't an option — the tyrosine and phenylalanine in standard nutrition can build to harmful levels. Tyrex is a medical food formulated specifically for this metabolic condition, giving parents and clinicians a dependable way to nourish a baby while keeping these amino acids under careful control.

The collection centers on Tyrex-1 Amino Acid-Modified Infant Formula With Iron, an unflavored powder supplied in a 14.1-ounce can. It provides complete infant nutrition — protein equivalent from a modified amino acid blend, fat, carbohydrate, vitamins, and added iron — but is free of tyrosine and phenylalanine, the two amino acids infants with tyrosinemia type I, II, or III cannot properly metabolize. Used as directed by a metabolic specialist, it helps support normal growth and development during a baby's earliest, most nutritionally demanding months.

Parents often ask how Tyrex fits alongside breast milk or standard formula. In most protocols, a measured amount of regular formula or breast milk is combined with Tyrex-1 to supply the small, controlled quantity of tyrosine and phenylalanine an infant still requires, while Tyrex delivers the remaining protein and calories. Because dosing depends on blood amino acid levels and the child's weight, the exact ratio should always come from the managing physician or metabolic dietitian rather than the can alone.

The unflavored powder mixes into a smooth formula and stores easily, and the added iron addresses a common shortfall in restricted diets. Keeping a consistent supply on hand matters, since these specialized medical foods aren't stocked in typical retail settings.

Explore related metabolic and specialty nutrition options in our broader Nutrition collection, or browse Infant Formula for additional feeding solutions.