My son has had great success with Enfamil Premium Lipil Formula. We have tried several other brands of formula, specifically for gas or fussiness. But the Premium formula Enfamil came out with was a relief compared to the others. It is a much finer powder that does not seem to upset his tummy or cause excessive spitting up. When we tried switching to the other brands, it made his gas worse and he would spit up more frequently. He now rarely spits up and hardly ever has painful gas or a tummyache. It is slightly more expensive than some other brands, but it is definately worth it. It is widely available...