My baby has been using ByHeart since she was 4 months because I needed some support with nursing. I was hesitant to use just any formula, but I had already researched and knew this was my top choice. Even though I didn't have a lot of money at the time, this was a big priority for me and I knew it was worth it! I've been able to continue breast feeding without the stress of weight gain and wondering if she had enough to eat! So grateful for the soft stool, good digestion and super minimal spitup even in the early months. She is now almost a year and we can confidently say we love ByHeart!