You already know what's staining your teeth: your latte, red wine, berries, to name a few. We're not saying to give them up, but you do have to take precautions to prevent discoloration. For the afternoons you can't resist that Diet Coke fix, use a straw to keep staining under control. Another way dentists advise controlling stains is to snack on crunchy fruits and veggies. Apples, celery, pears, cucumbers, and carrots are all "high in water content, which stimulates salivary production to help clean your mouth, " explains Irwin Smigel, a cosmetic dentist in New York. Your waistline will thank you, and so will your teeth. Already a fan of chewing gum? After a glass of red wine, pop a piece of Supersmile All Natural Professional Whitening Gum ($5 for a pack of 12). Loaded with calcium peroxide, the gum works between meals, fighting plaque, discoloration, and cavities, and it's especially helpful after having carbs or highly acidic food and drinks (like white wine), which can cause enamel to wear down, making teeth more susceptible to stains from anything you consume afterward, Smigel says.