What Causes Sensitive Teeth?Our Teeth Are Protected By Enamel. When The Enamel is Worn Away Or Gums Recede, Dentin Underneath Becomes Exposed And Teeth Become Sensitive, Especially To Hot And Cold Foods. This is Called Dentin Hypersensitivity. It is Usually Experienced As We Age, But Tooth Grinding, Gum Disease, And Brushing Too Hard Can Also Contribute. Why Tom's of Maine For Sensitive Teeth? The ingredients in Tom's of Maine Toothpaste For Sensitive Teeth Help Reduce The incidence of Pain While Efficiently Cleaning Your Teeth. Our Active ingredient, Potassium Nitrate, is Clinically Proven Effective in Soothing Sensitive Teeth And is Derived From Naturally Occurring Deposits of Nitrate Ore Rather Than The Synthetic Nitrates Used By Other Brands. Our Safe, Low Abrasion Formula Protects Tooth Enamel While Cleaning Teeth. Natural Flavor: We Blend Wintergreen And Peppermint Oils For A Smooth, Refreshing Flavor That Avoids Bitterness. The 5 Day Flavor Test: Tom's Toothpaste is Different From Major Brands Because It Does Not Contain Saccharin, A Synthetic Sweetener 400 Times Sweeter Than Sugar. Your Taste Buds May Need A Chance To Adjust To The Experience of A Natural Flavor. Try This Simple Test. Use Tom's For 5 Days. Then Try Your Regular Brand. We'Ll Wager You'Ll Stay With The Clean, Refreshing Taste of Tom's. How Do We Define Natural? By Natural We Mean That The Product Contains No Artificial Preservatives, Artificial Dyes, Or Artificial Sweeteners (Like Saccharin) And is Created With Minimally Processed ingredients Originally Sourced in Nature. On Each Box We List Our ingredients, Their Purpose And Source. We Believe You Have A Right To Know. Uses:Builds increasing Protection Against Painful Sensitivity of The Teeth To Cold, Heat, Acid, Sweets Or Contact.