Can the teeth turn black when drinking coffee?

Some dentists claim that the dark brown pigment in roasted coffee beans can soak in the teeth, causing the teeth to blacken, especially in the upper front teeth, and drinking coffee all day can soak the teeth in coffee stains. Dentists suggest gargling with water after drinking coffee for a short period of time, and the shorter the time it takes to drink coffee, the less likely it is to cause a coffee smile. For many doctors, this kind of work is difficult to accept.

How long will it take you to drink coffee? an hour? a minute? When you drink coffee, coffee stays in your mouth for much less time than when you eat tomato sauce (crimson) or carrots (dark yellow). Lycopene is a crimson carotenoid often used in food coloring and is widely found in tomatoes, watermelons, pink grapefruit, pink guava, red pepper and roses.

Many people in the United States eat tomato sauce, and no dentist has warned people to beware of lycopene smiles, but lycopene is far easier to color objects than coffee. Scientific studies conducted by dentists have shown that smoking and age have significant effects on exogenous tooth coloring, and male teeth are more likely to be stained than women. Smoking is an important factor in tooth coloring, and smokers usually drink coffee. The effect of tea and coffee on tooth coloring was not obvious. Drinking coffee blackens teeth is a fallacy that must be corrected.

Recent studies have found that some coffee drinkers have healthier teeth, further confirming that coffee is a healthy drink.

A study published in the Journal of Agricultural and Food Chemistry of the American Chemical Society shows that coffee made from roasted coffee beans has antibacterial activity against some microbes, such as Streptococcus mutans, the main pathogen that causes dental caries. Experiments conducted by scientists at two Italian universities have shown that some molecules in coffee can prevent Streptococcus mutans from sticking to enamel. Gabriella, a lead researcher at Pavia University. "the solutes in all coffee have strong anti-adhesion properties, not only in natural coffee, but also in molecules induced by roasted coffee beans," Ghazani said.

Research data show that trigonelline, a water-soluble component in coffee, is the main reason for coffee to have a certain aroma and flavor, and "may also be the main substance to make coffee have anti-adhesion activity". Because of the antibacterial and anti-adhesion activity of coffee, it is speculated that coffee can reduce the reproduction of Streptococcus mutans on the surface of teeth, so it is effective in preventing dental caries caused by Streptococcus mutans. Smile, coffee drinker, if you are worried that drinking coffee will blacken your teeth, or "lycopene smile" and "carrot smile", just brush your teeth twice a day regularly.

Here we have the answer to the question that the teeth will turn black when drinking coffee.