I bought this because I have pigmentation from acne scars. I think I noticed a difference right after the first use, went through some comments and mostly tested blue + purple first and then blue + yellow, also red + purple and red + yellow. I think you get a glow right after the first use, of course it also depends on which products you use before and after and what skin type you have. However, I have very sensitive skin and the mask is a bit big for my face, so the mouth area sits a bit awkwardly and I’ve gotten some small liver spots/freckles above my lip, but nothing that bothers me directly :) I’m super satisfied with the mask! ✨