My very, very fave has been the whitening pen. Raise your hand if you have had sensitive teeth while using whitening strips or products in the past–SO MANY of us! This will not do that, plus it’s safe to use even if you are nursing or pregnant! I’ve seen great results with the peroxide whitening pen, and it’s so easy to use. I use Gel Brite to get bright and Stay Brite to keep them from getting yellow again. Then every few weeks, I use Get Brite again for a little boost. Safe, food-grade hydrogen peroxide and coconut oil work in harmony to gently whiten teeth fast and lift deep-set stains without causing sensitivity. WINNING! Seriously, I cannot recommend Dr. Brite enough; if you’ve been looking for safe but effective oral care products, start here!