Dr Nate Coughlin, an orthodontist who practices in Texas, said: ‘There’s some claims that the red dots, the blue dots, the white dots ... ‘The toothpaste color-coding system simply doesn ...

For ivory keys, which are porous and can absorb substances applied to them, it's crucial to use plain white toothpaste. Gel or colored toothpaste might corrode or discolor the ivory. Even for plastic ...