I have tried at least 5 formulas with my little girl and none of them worked. She would push it out with her tongue and spit up horribly. She wouldn’t drink whole bottles unless it was my breast milk, which I’m not producing enough to exclusively feed her. So I had done some research and found byheart. I decided I’d try it. I received it today and it was her feeding time, I fixed her a bottle and she immediately took it with no hesitation. And drunk THE WHOLE BOTTLE. She had finished several whole bottles today. No spit ups. No gassy belly. Byheart has been a life saver and it’s only day 1. I’m so glad we found this. Thank you so much!!!!