I used enfamil! if tummy upset is an issue try the enfamil gentlease it's still milk based but broken down as much as possible. if possible try to breastfeed. it's so much healthier for baby and has great benefits for mother as well

There are options to get GMO free for both of these brands now, which makes me really happy. My sister uses the honest brand organic formula

thanks :)

I used Enfimal with my son he never had problems digesting it and I only stuck with it cause that's what the hospital gave me to supplement with when I was trying to breast feed due to his low birth weight