We transitioned to ByHeart after baby boy was 8 months old. Up until then I was breastfeeding. We had tried a few other formulas and he would either throw up a lot of them or completely refuse them. Since I also still breastfeed I wanted something close to breast milk and that was healthy, I also didn’t want a formula that smelled gross and ByHeart has checked every single box for us I have even recommended it to a few of my mom friends as well who switched from Kendamil and love ByHeart as well. We love that we can ship it right to our door and save money doing so ! Byheart is great we love it!