This large multicenter double-masked clinical trial tested whether supplementation of standard neonatal parenteral nutrition with glutamine would reduce the risk of death or late-onset sepsis in extremely-low-birth-weight (ELBW, less than or equal to 1000 gm) infants. Neonates with birth weights of 401-1000gm were randomized to standard TrophAmine or TrophAmine supplemented with glutamine before 72 hours and continued until the infants are tolerating full enteral feedings.