My teeth got brighter in just 2 days and I did not experience or feel any sensitivity on my teeth.
The products are definitely more effective than the previous other brand I was using. I feel like I have achieved the dentist-level teeth whitening by just doing it by myself at home.😄😁

If you struggle with stains or want to brighten your teeth at home like I did, I highly recommend that you get yourself some Colgate Optic White