Yellowing and discolouration of the teeth is a natural body process that happens as we age. Consumption of certain beverages and food like Tea, Coffee, soda, and tobacco, However, may stain, erode, and discolour the teeth faster. It is recommended to regularly brush your teeth and gargle with mouthwash to remove the stain from the teeth and avoid carbonated drinks, as they may erode the enamel and increase the absorption of colour into the teeth. The application of fluoride to the teeth may also help slow down the yellowing process.