After using the [Glorysmile] 5 ml clinic Salon teeth whitening gel syringe, the effect is simply amazing! Previously, my teeth became dull and yellowish due to long-term consumption of coffee and tea. I tried many whitening methods, but none of them were very satisfactory. After using this gel, it can be clearly seen that the color of the teeth gradually becomes lighter. The operation is very convenient. Just use it according to the instructions. Moreover, when using it, there is no sharp or sensitive sensation in the teeth. Now my teeth have whitened by several degrees, and I smile much more confidently! I sincerely recommend it to my friends who have the same troubles as me!