Hi- We are so sorry to hear that your baby is having a hard time. Our infant formula is made with a patented protein blend derived from whole milk, so it’s unfortunately not a hypoallergenic formula, and would not be appropriate for babies with a cow milk protein allergy. That being said, infants have a wide range of sensitivities, so we suggest you speak to your pediatrician to see if ByHeart is right for you and baby!