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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4. Hydrogen Peroxide. The mild bleaching effect of hydrogen peroxide can help make yellow teeth white again. 1  Rinse and gargle with a mouthwash that has hydrogen peroxide. 2  Make sure not to swallow the hydrogen peroxide. 3  You can also make a paste of baking soda with hydrogen peroxide and gently brush your teeth with it.