Builds increasing protection against painful sensitivity of the teeth to cold, heat, acids, sweets, or contact. Aids in the prevention of dental cavities. Helps to gently whiten your teeth. Leaves a protective shield to help prevent new stains forming. Freshens breath, fights cavities and helps keep gums healthy.Active Ingredients: Potassium Nitrate 5%**; Sodium Fluoride 0.25% (0.16 w/v Fluoride Ion); **Maximum FDA Sensitivity Active Ingredient