sugarless gum teeth whitener

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The Tooth Whitener You Probably Have in Your Purse
What to try: Sugarless gum.

Why: Chewing gum causes you to produce more saliva, which is a natural buffer against stains, explains Matthew Messina, DDS, a spokesperson for the American Dental Association. When your mouth gets dry, food particles and bacteria can settle on teeth, affecting the enamel. Common causes of dry mouth are talking on the phone, medication (prescription drugs for depression, anxiety, heart problems and nerve pain; OTC meds like antihistamines and decongestants) and—ready for this?—cardio exercise. Studies have shown that when athletes run, their saliva levels decrease. In addition to chewing gum, sip water throughout the day and swish it around your mouth after eating.

What not to try: Dentists recommend against drinking energy drinks while exercising (or at any time). They're highly acidic and can erode tooth enamel, and they also often contain dyes, which could lead to stains over time..