Amazon.comEnfamil PREMIUM Infant provides the nutrients needed for your baby"s healthy physical growth and development. It"s clinically proven, before the addition of prebiotics, to support brain and eye development in babies up to 12 months, and its Natural Defense Dual Prebiotics® blend is designed to help support an infant"s natural defenses. This formula is part of Enfamil Staged Formulas, along with Enfamil PREMIUM Newborn and Enfagrow PREMIUM Toddler (not included).Prebiotics are Designed to Support Baby"s Natural DefensesBabies" digestive tracts are home to 70% of their immune systems. Emerging science suggests prebiotics may support your baby"s developing immune system by feeding the good bacteria found naturally in the digestive tract.With Enfamil PREMIUM® Infant, you can give your baby a formula designed to help support his or her natural defenses. Our dual prebiotic blend is designed to work longer in the digestive tract for more complete support compared to our previous formulas. Triple Health GuardEnfamil PREMIUM Infant has Triple Health Guard, this helps support the immune system while promoting growth and brain and eye development.This formula supports healthy growth patterns that are similar to those of breastfed babies in both weight and length after 12 months and it"s nutritionally complete and includes DHA (docosahexaenoic acid) and ARA (arachidonic acid).The formula, studied before the addition of prebiotics, also supports higher mental test scores through 18 months when compared with the effects of discontinued Enfamil without DHA and ARA. And it"s clinically proven, before the addition of prebiotics, to enhance visual acuity through 12 months compared to the discontinued Enfamil without DHA and ARA.For the immune system, the formula supports respiratory health and immune outcomes. It also has Natural DefenseTM Dual Prebiotics.What"s in the BoxEnfamil PREMIUM 32-Ounce Ready-to-Use.