Similac Max Pro 1 is a complete and advanced nutritional formula designed for infants from birth up to 6 months of age. This milk is specially designed to be easily digestible and gentle on the stomachs of children who suffer from mild digestive disorders or lactose intolerance. Low Lactose: The formula is 98% lactose-free, which reduces gas, colic, and fussiness associated with lactose intolerance.