Safely bleaches your teeth to a natural white color. Begin to see results in 2 weeks-or less. Contains fluoride to prevent cavities. Professional bleaching peroxide cleans and whitens your teeth. Now you can safely and simply bleach your teeth up to 5 shades whiter. Rembrandt Dazzling White is a toothpaste and bleaching gel in one. Its advanced brush-in formula helps restore your teeth to their natural white color. With time, pigmentation from food and drink causes our teeth to discolor.