Similac For Supplementation Infant Formula Ready-to-Feed. Should you choose to introduce formula, Similac Supplementation bottles are an ideal complement to breastfeeding. Our exclusive formula has: Prebiotics (GOS) for softer stools more like those of breastfeeding babies. DHA (Omega-3) and ARA (Omega-6) for brain and eye development. Nucleotides to help support the immune system. Lutein for baby"s eyes. Breast milk is recommended. If you choose to use infant formula, the makers of Similac have a formula that"s right for your baby.* Gentle nutrition to complement breast feeding * For birth to 12 months * Milk-based * Similac has a unique blend of DHA and Lutein - important nutrients during this critical time of brain and eye development. * Just twist off the cap - no powder mixing or measuring - and the formula is ready for your baby. * Ready-to-Feed, Do not add water. * Always refer to the product label for the most up-to-date nutritional information.