How can the tooth turn yellow when drinking coffee? Teach you how to solve the problem of yellowing teeth when drinking coffee.

Coffee is a happiness that many young people can't quit in modern times. The strong aroma of coffee makes people feel refreshed. No matter they go to work or study, they all get twice the result with half the effort. But some people feel that the teeth gradually turn yellow after drinking too much coffee. How is this going on? Coffee contains a yellowish-brown substance called tannin or tannic acid, which is associated with yellowing of teeth. Tannic acid is a kind of complex polymer compound, which is yellowish or brownish yellow powder at room temperature. it is extremely astringent, soluble in water, easy to absorb moisture, easy to oxidize in the air and darker after oxidation, and widely exists in the bark and fruit of many kinds of trees. Our teeth are not as smooth as they seem, but there are many micropores. If you drink coffee for a long time, tannic acid will precipitate and attach to the teeth and then infiltrate into these micropores. With the passage of time, tannic acid further accumulates and deepens in the teeth, and in the long run, the teeth will turn yellow.

So is there any way to avoid it?

First, you can try to add milk to the coffee, tannic acid has the characteristics of precipitating protein, can combine with casein in milk, hinder the penetration of tannic acid into the teeth, thus weakening the staining effect of coffee on teeth.

Second, you can also choose to drink coffee with straws, which can reduce the contact area between teeth and coffee and reduce the dyeing effect of coffee on teeth.

Third, you can rinse your mouth after drinking coffee, dilute the coffee left in the mouth, and avoid teeth being dyed to a certain extent. One thing to pay attention to is that do not brush your teeth immediately after drinking coffee. The acid in the coffee will soften the enamel on the surface of the teeth. Brushing will destroy the enamel at this time. It is best to wait for the enamel to return to normal half an hour after drinking the coffee.