Review on Fast-acting Zero Glow Teeth Whitening Gel - 4X Syringes | 44% Carbamide Peroxide Refill by Maria Mejia

The strongest product (44% Carbamide Peroxide) I have ever found without a brand name. I can't pay 4x, 6x or even 10x for the same product just because of the name. It works just as well as any whitening product I've tried. Like any peroxide product, it can burn your gums if left on for a long time. I use a molded mouth card that clearly shows the impressions of the teeth and lightly mask only those areas. This keeps it off my gums and keeps it foolproof. These 4 tubes will last me many, many months. I will buy more if needed.