evidence: FALSE: The colour-codes on a toothpaste tube do not indicate what ingredients the toothpaste contains [...] A Facebook post claiming that the colour codes at the bottom of a toothpaste tube indicate the type of ingredients the toothpaste contains, is FALSE. [...] Moreover, the reason toothpaste tubes contain colour-blocks, according to the explainer, is to actually help in the manufacturing of the toothpaste tubes by telling light sensors where the end of the tube is so that it can be cut and sealed correctly.