Table salt does not whiten teeth. The chemical composition of table salt is sodium chloride, which is easily dissolved in water to form a solution, also known as brine. Using salt water to gargle has a certain effect of inhibiting bacteria in the mouth, but does not have the effect of whitening teeth. Although salt is in granular form, it will dissolve when it meets water in the mouth, so brushing with salt has no effect of increasing friction. There are many ways to whiten teeth, you can go to the dental hospital to choose porcelain veneers or cold light whitening and other medical aesthetic programs, these methods can make the teeth whiter in a short period of time, but we need to pay attention to, any project is risky, you need to be careful to choose the hospital and the attending physician. In addition, teeth have an important role, so pay attention to personal hygiene and oral health.