This product has been overly hyped so much that I won’t even bother talking too long about it. CHI silk Infusion does not work as a serum for me. Uh-huh my hair is too thick and curly for it too work. But, it does a create job of smoothing split ends and helping make the hair above the split end healthy so the end does not split anymore up the shaft. How it does this? Not a clue. But it works, and that is what counts. 5 stars.