Our daughter was having trouble with diaper rash while taking aonther type of formula.  She had to take the formula because we didn't have enough breast milk, and we tried a couple of brands of formula that would give her very bad diaper rash.  She was conitually upset and had diagestive problems every day.  Our doctor suggested Nestle Good Start and so we decided to try it.  After trying it for only a few days our daughters' diaper rash was gone.