Arginine. Aroma. Cellulose Gum. Zinc Oxide. What is the bad ingredient in Colgate toothpaste? Triclosan: Cancer-Causing Ingredient in Colgate Toothpaste? Does Colgate have harmful chemicals? The chemical triclosan can be found in Colgate Total, a top selling toothpaste brand from Colgate-Palmolive Co. The toothpaste uses triclosan to help prevent gumRead More →