Advantage Dental’s whitening procedures have restored the smiles of people with stained, dull, or discolored teeth with one short visit. Foods and drinks we consume like coffee, tea, berries and soy sauce are notorious for staining teeth. Food particles are naturally attracted to a tooth’s enamel by certain proteins so over a period of time our teeth actually become more absorbent and vulnerable to staining from foods, drinks the effects of aging or things like caffeine and tobacco.