We stumbled upon this formula at Target while looking for something with a lower iron content than the big brands. Our little was struggling with constipation to the point that our pediatrician had recommended giving her diluted apple juice. That method however failed, but then we found ByHeart and tried it and our little babe has been able to go on her own with no issues ever since. Also LOVE that ya'll provided a code for 50% off if I purchased directly from the website at Thanksgiving. I wish I could've bought more at the time because that was an excellent deal!