Our teeth brightening pens contain sodium bicarbonate, white willow bark extract, malic acid. It can gently and effectively break down tooth stains and regulate the acid-base balance in the mouth. Gently dissolves dirt and promotes tooth surface cleaning. Deep nourishment, forming a protective layer to protect teeth and gums health. Its use method is very simple: 1. Open the bottle cap, apply the product directly on the teeth with the tip of the pen; 2. Wait 5-10 minutes and rinse your mouth with water; 3. Use once in the morning and once in the evening. Teeth brightening pen instantly whitens, without a sweep, witnessing dazzling changes in an instant. Pen design, accurate stain location.