Similac Soy Isomil Infant Formula Concentrated Liquid. * Comfort your baby"s fussiness and gas with Similac Isomil Soy - specially designed with the gentleness of soy to soothe the tummy. * Some issues, such as fussiness and gas, are a common part of feeding your baby. However, if these common feeding issues continue, as your physician about switching to Similac Soy Isomil. * Soy- based formulas such as Similac Soy Isomil have been clinically shown to help reduce these feeding problems. And no other soy-based formula has been studied more than Isomil. * Just add formula to water and shake before serving. * Always refer to the product label for the most up-to-date nutritional information. * *Soy formulas are not recommended for premature infants with birth weights of less than 1800 g.