So my daughter's pediatrician put her on nutramigen formula. She said NOT to warm it up, as warming breaks down the probiotic, and to make sure to use PACKED scoops. I read the can and it says the same thing. She warned us that most people assume it has the same instructions as regular formula that can be warmed and uses unpacked scoops. Just wanted to pass along the information to those who maybe didn't read the can when they switched!