”How can I whiten my teeth effectively and make sure those yellowish stains don't come back?” you might wonder. Professional whitening is the best option if you are looking for the most profound results. Your dentist can safely use gels with higher concentrations of bleaching agents than drugstore kits. Over-the-counter options like strips and paint-on applications do provide benefits to tooth whitening and are less expensive. No matter how you start whitening, the trick to getting your teeth white and keeping a brilliant smile is excellent oral hygiene.