Because it works by depositing purple color — Red 33 and Blue 1, to be specific — it's effective on all surfaces, including veneers, crowns and even dentures. Other whitening products use bleaching agents (namely hydrogen peroxide), which can leave teeth spotted in the end...
Ultimately, my very favorite was this doozy I found at Tammy’s Recipes. I fiddled around with the amounts for a while, and eventually ended up with something that put a smile on everyone’s face. Sweet, smooth, and mintally delicious. ...