Crest Pro Health Mouthwash Turning Customers Teeth Brown

Nice.

Cetylpyridinium chloride is the active ingredient in Crest Pro Health mouthwash. Proctor and Gamble product research says the rinse is safe and that their single blind study showed, “Side effects were minimal, with no between-group differences in hygienist-rated calculus or stain accumulation…” However, many have gathered at the Amazon page for the product to complain that it stains teeth brown.