Rub one or two sage leaves on your teeth (fresh, not dried). Baking soda gets the toughest coffee stains out of mugs so it will help remove stains from your teeth as well. Just rub some over teeth. Or use a mixture of baking soda and hydrogen peroxide to whiten teeth. Strawberries as well can help whiten teeth when rubbed over them regularly. If you plan to purchase a product to whiten teeth and don't want the high price of Dentist whitening (which by the way gets the best results-you get what you pay for when it comes to whitening), the best product is Crest Whitestrips. Don't waste money on any other brands. But over the counter tooth whiteners work mainly by dehydrating your teeth and not really changing their actual color and will revert back to the same color after a period of time, which is not so with whitening by your Dentist.