Coffee, Tea, Red Wine
Tannins and chromogens in these drinks bind to enamel surfaces and create persistent extrinsic stains, especially with daily consumption.
Tooth color is determined by two layers: the outer enamel and the inner dentin. Enamel is naturally semi-translucent, while dentin is yellow-brown. As enamel thins with age (roughly losing measurable thickness across decades), the darker dentin shows through, producing the yellowing many adults notice in their 30s and 40s.
Extrinsic stains form when chromogens (color compounds) from coffee, tea, red wine, berries, and tobacco bind to the protein pellicle on the enamel surface. According to the American Dental Association, these surface stains respond well to professional cleaning and bleaching agents containing hydrogen peroxide or carbamide peroxide.
Intrinsic stains develop inside the tooth from antibiotics like tetracycline taken during tooth development, excessive fluoride exposure (fluorosis), trauma, or aging. These require stronger professional whitening or restorative options. A thorough professional teeth cleaning is often the first step to remove surface buildup before whitening begins.
