For Babies 0-12 Months. Add water. Excellent nutrition. Each makes one-8 fl oz feeding. Closer than ever to mother's milk. Breast milk is best for babies. When an infant formula is needed, use Similac with Iron. Today's Similac is closer than ever to mother's milk. Its unique, patented formula contains nucleotides, compounds present in breast milk. It is designed to be gentle on your baby's developing system. Your baby's stools are likely to be soft or unformed, similar to those of a breast fed infant. If a milk-free feeding is recommended, Isomil Soy Formula with Iron is the first choice of more doctors.