121447 Free standard shipping for online orders. For babies with sensitive tummies, when a soy formula is preferred. Enfamil ProSobee is a soy protein isolate formula and is relied on for the routine feeding of infants with feeding problems resulting from sensitivity to milk-based formula. Enfamil ProSobee includes docosahexaenoic acid (DHA) and arachidonic acid (ARA), nutrients also found in breast milk, that promote brain and eye development. Enfamil ProSobee is a lactose-free and sucrose-free soy formula.