Add water. For common feeding problems such as fussiness, gas and spit-up. Milk-free. Lactose-free. 1st Choice of doctors (among soy formulas). 65% Greater Calcium Absorption (Average percent of intake comparing Isomil to Enfamil ProSobee): Isomil and Enfamil ProSobee contain the same amount of calcium. But, in clinical studies, babies fed Isomil absorbed 65% more calcium than when fed Enfamil ProSobee. Breast milk is recommended. If you feed formula, the makers of Similac promise to deliver excellent nutrition you can trust. That means providing the right formula to help your baby grow up healthy and strong. You can turn to Isomil with confidence: 1st Choice of doctors for a soy infant formula. For common feeding problems such as fussiness, gas and spit-up. shown through research to be well tolerated. Provides calcium for your baby's growing bones. Supports good growth similar to that of infants fed breast milk. Trusted nutrition for more than 30 years.