Similac Advance Non-GMO Infant Formula is a nutritionally complete milk-based iron-fortified infant formula, featuring OptiGRO, our exclusive blend of lutein, DHA and Vitamin E, important ingredients found in breast milk. Similac Advance is designed to support your baby's developing immune system, brain, and eyes, and to help build strong bones. Now available in a Non-GMO option. Ingredients not genetically engineered.