There is no clinical or literature evidence to prove that brushing with baking soda has a whitening effect on teeth. Tooth whitening refers to changing the color of the teeth themselves. Brushing and scaling can only remove the pigment attached to the tooth surface and cannot achieve the whitening effect. In addition, patients using baking soda to brush their teeth also need to pay attention to the following aspects: 1, the main component of baking soda is sodium bicarbonate, which can be dissolved in water, hydrogen ions are produced after hydrolysis, which has a slight corrosive effect. 2, baking soda is an alkaline substance, long-term use of baking soda will disrupt the acid-base balance in the mouth and hurt the gums. 3, baking soda removes only the dirt attached to the surface of the teeth, and does not change the color of the teeth. Therefore, it is recommended that patients who want to whiten their teeth should go to a regular dentist and have their teeth whitened under the guidance of a doctor.