Whitens your teeth and easy to use
My husband started using the Whitening Gel Pen on June 02. He's using the pen twice daily.  He's is now starting on the second pen. The pen is very easy to use. It only takes a minute to apply. There is no stinging and the flavor is okay. We can already see a difference in the shade of his teeth. I believe there will be an even better result when he finished the four pens.
Rating: 5 stars