Similac Pro-Sensitive is designed for fussiness and gas due to lactose sensitivity (not for infants or children with galactosemia). Similac Pro-Sensitive is the first infant formula for sensitive tummies with 2'-FL human milk oligosaccharide, (Not from human milk.) an immune-nourishing prebiotic found (At significant levels) in breast milk that supports baby's developing immune system, and the first leading infant formula with no artificial growth hormones (No significant difference has been shown between milk derived from rbST-treated and non-rbST-treated cows.). Parents reported (No significant difference has been shown between milk derived from rbST-treated and non-rbST-treated cows.).. Our exclusive blend of DHA, Lutein, and Vitamin E is important for helping support baby's brain and eye development. You can trust Similac, the No. 1 brand chosen by moms. (Total US infant formula, all outlets as of 3/31/2018, Nielsen data)