Nan optipro is a line of infant and growing-up milk formulas developed by nestlé, with different versions for various age groups. The formula is inspired by breast milk research and contains a blend of "Optimized protein" (optipro), vitamins, minerals, essential fatty acids like dha, and often probiotics like l. Reuteri. It is designed to support a child's development, including immune function, bone growth, and cognitive development.