Enfamil Premature infant formula has high levels of some nutrients to help promote catch up growth and support a developing immune system. For rapidly growing premature or low-birth-weight babies. Milk-based infant formula for premature or low birth weight infants. Levels of calcium, phosphorus and vitamin D within the ranges recommended by experts for bone mineralization and growth. Includes our blend of DHA and ARA, two nutrients also found in breast milk. IMPORTANT NOTICE: MOTHER’S MILK IS BEST FOR YOUR BABY.