On whether 5,000 ppm of sodium fluoride can whiten teeth
The world says that 5,000 ppm of sodium fluoride can whiten teeth. The authenticity of the matter should be carefully examined.

Sodium fluoride has its own uses in oral health care. It is often added to toothpaste and other substances at a low concentration to protect the teeth and prevent caries, and the effect is obvious. Cover fluoride ions can combine with minerals in tooth enamel, strengthen its structure, and increase its acid resistance.

However, 5,000 ppm, this concentration is quite high. High concentration of sodium fluoride, the primary effect, is not in whitening. Its effect on the tooth body is more important to prevent caries and strengthen, unlike whitening agents, which are specially designed to remove stains and brighten. The change of tooth color is mostly due to the adhesion of exogenous pigments, such as tea stains, smoke stains, or endogenous factors, such as tetracycline teeth, fluorosis teeth, etc.

5,000 ppm sodium fluoride, which does not have the ability to strongly decompose or remove exogenous pigments. And if used improperly, high concentrations of fluoride will cause the risk of dental fluorosis, which will damage the appearance of teeth, not conducive to whitening.

Therefore, 5,000 ppm sodium fluoride is reasonable, and it is difficult to take up the task of whitening teeth. Users should be aware of its properties and do not mistake high concentrations of fluoride as a whitening prescription, so as not to be counterproductive and harmful to dental health.