Effervess O2 Professional Whitening Gel is one of the most effective product in the line up to help control plaque and bacteria.  The biggest problem for dry mouth. O2 oxygenates your gums & whitens your teeth while fizzling away the thick sticky plaque while brushing. All you need to do is apply it to your toothbrush with toothpaste. A neutral PH helps balance and reduce acids in your mouth while the Xylitol helps fight off cavities. This whitening gel is also very cost effective! The bottle lasts for at least 4 to 6 months on average. Here at Effervess we are committed to helping you get a white, clean and healthy smile by offering you proven affordable solutions that we use ourselves! We are so confident that you will love our 02 whitening Gel that we offer a 30-day money back guarantee!