Our dental care gel pens contain peppermint extract, sage oil, lemon extract. It can effectively remove stubborn tooth stains. Peroxide-free formula, gentle, does not irritate teeth and gums. Its use method is very simple: 1. The first time to use the product 40 times. 2. Squeeze out an appropriate amount of toothpaste and apply it evenly to your teeth. 3. Use 1-2 times daily. Whitening results are immediate and noticeable changes can be seen within minutes. Pen design, easy to carry, anytime, anywhere use.