I felt like it didnt do much for my teeth
I felt like it didnt do much for my teeth. I only used it once. It made my teeth and gums sensitive for a few days which i didn't like. My brother used it and his teeth looked a little yellower than mine to start so im posting his picture results. I would say his went a shade or two whiter and he reported the same sensitvity for a few days.
Rating: 3 stars