Tom"s of Maine Natural Sensitive Care SLS-Free Antiplaque Fluoride-Free Toothpaste, using potassium nitrate, a naturally occurring, clinically proven active ingredient, we have formulated this toothpaste to help soothe the pain of sensitive teeth. Its low - abrasion formula protects tooth enamel while cleaning teeth effectively, and has the fresh, clean taste of natural flavor oils, so it"s never bitter. Kosher and Halal