evidence: The toothpaste colour-coding system simply doesn’t exist. The colour on the bottom of your toothpaste means absolutely nothing about the ingredients, and you shouldn’t use it to help you decide on a toothpaste. Anyway, the coloured squares on the bottom of the toothpaste tube have nothing to do with the product’s content. They are manufacturing process artifacts, also known as colour marks, printed marks or eye marks. [...] Toothpaste Color Mark Means