While both the products contain our clinically tested PAP+ solution, they each serve different whitening needs. This is because the Whitening Strips are designed to stick to your teeth and meant to be left in place for 30 minutes. This allows the whitening solution a longer window to act on the pesky stains and effectively oxidize and eliminate them. We recommend using the 14 treatments in each box to see a noticeable difference in the colour of your teeth.
On the other hand, our Whitening Pen dispenses the solution directly on to your teeth. However, after a few minutes, the solution is likely to get washed away by the saliva your mouth naturally creates thus providing a shorter window for the formula to act on the stains. We recommend using the Pen to give your teeth a touch up on the go, protect the enamel from new stains, and to whiten over time.