Tea, coffee, tobacco, and wine can leave stains on your teeth. Regular intake of these drinks can create yellow stains on your teeth.
Now, it's not always possible to remove this yellow layer by brushing. Hence, you need professional help. Dental teeth whitening uses one kind of bleaching solution (peroxide) to remove stains from your teeth. The process is an effective one. Hence, you can make your teeth white again. View on what are the difference between professional teeth whitening vs home kits.