Baking soda can not brush your teeth, baking soda is a weak alkaline substance, long-term use of baking soda to brush your teeth will break the acid-base balance in the mouth, excessive intake of alkaline substances will also have a negative impact on the body. Some people think that using baking soda to brush their teeth will whiten their teeth, in fact, this view is incorrect, baking soda in the process of brushing teeth only play the role of friction agent, can partially remove the food debris on the surface of the teeth and the soft dirt, the use of baking soda brushing does not have the effect of whitening teeth. If you want to make your teeth whiter, you need to go to the hospital to have an ultrasonic cleaning to remove the pigment on the surface of the teeth and the teeth, so that the teeth become very white. If your teeth are darker or have tetracycline, you need to go to the hospital for cold light whitening, which is the only way to bleach your teeth and enhance the tone of your teeth.