Photo by @arthurhidden on Twenty20 Teeth Whitening Gels have been proven to be one of the best chemicals to whiten teeth. Teeth whitening gels come in many different levels of concentration. Concentration levels for teeth whitening gels ranges from 5% to 36%. The higher the concentration for the teeth whitening gels, the better and quicker the results. The most popular form of teeth whitening gels is the 22% carbamide peroxide gel, which is used in most dental offices nationwide and at…