Other Information: Products containing stannous fluoride may produce surface staining of the teeth. Adequate toothbrushing may prevent these stains which are not harmful or permanent and may be removed by your dentist. This Crest is specially formulated to help prevent staining. See your dentist regularly. Fluoride toothpaste for anticavity, antigingivitis and sensitive teeth. Starts working on sensitivity immediately (Starts working immediately by blocking tubules) for relief within days. Refreshing Sensitivity Relief: Creates a shield of protection against food/drink for sensitivity relief within days. Clinically Proven Healthier Gums: Neutralizes harmful plaque bacteria at the gum line to bring gums back to health. www.crest.com. www.pg.com. Questions? 1-800-594-4158.