Birth to 12 months. Similac Lactose Free is now Similac Sensitive! Ready to feed. Do not add water. DHA/ARA. For fussiness and gas due to lactose sensitivity. Easy to digest. Milk-based, lactose-free. Strong babies start here. Specially made with a unique blend of carbohydrates for fussiness and gas in babies with lactose sensitivity. An easy-to-digest, milk-based formula. DHA and ARA, special nutrients found in breast milk that are important for brain and eye development. Breast milk is recommended. If you choose to use infant formula, the makers of Similac have a formula that's right for your baby's developing digestive system. Not intended for use by infants or children with galactosemia.