Gentlease didnt work for me. I bought the soy. Wish me luck @jacesterlingsmommy,
the prosobee is soy. the other two are special hypoallergenic formulas so you really have 2 different types there. The nutramigen is made by Enfamil also. I've tried all 3 and stuck to soy. If you want something for gas try the purple can of Enfamil, gentlease.
same for us but my son also has reflux. hope it helps!