Sodium chloride. Common salt helps the body to normally meet the requirements of sodium and chlorine. Sodium ion are basic in reaction while the chloride ions are acidic and they are together responsible for the acid base equilibrium in the body.
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3. Use a whitening pen. Like the whitening strips, whitening pens use a gel containing peroxide in order to bleach the teeth. 1  To use, remove the cap and twist the pen to release the gel. 2  Stand in front of a mirror and smile widely, then use the pen to paint the gel onto your teeth.