These pastes get their name from their vibrant purple tint. “Purple toothpaste works by using purple dye to neutralize any yellowish stains or coloration on the teeth,” explains Rhonda Kalasho, DDS of ...

Toothpaste tubes typically have color-coded bars, which some people believe point to their ingredients, such as green indicating all-natural toothpaste. However, this is entirely false, with the bars ...