The gel’s violet pigment neutralizes yellow ... Check out these 5-star reviews from folks who love their teeth-whitening pens. “I love these purple teeth whitening pens! They Really Work!

If you drink a hot cup of coffee (or tea) every morning, you already know that stained teeth are inevitable. But what you might not know is that whitening those teeth back to pristine conditions ...

To use, simply twist the pen to release the gel onto the brush, then apply a thin layer of the whitening gel directly onto your teeth. Wait for a brief 10-minute period before rinsing with water, ...