Enfamil ProSobee Infant Formula is a soy-based formula designed for babies with sensitive tummies; to reduce fussiness and gas sometimes caused by milk-based formula; and for when a soy formula is preferred while still providing the complete nutrition your baby needs to reach key milestones. It is a soy protein isolate formula, and this unique formula includes docosahexaenoic acid (DHA) and arachidonic acid (ARA), nutrients also found in breast milk, that promote brain and eye development. Plus, it is also a lactose-free and sucrose-free soy formula, and it is designed to provide a sole source of nutrition for infants up to age 6 months.