Human teeth are pale yellow to fawn. Teeth become darker with age. Some high-pigment foods and drinks, such as coffee, tea and certain medicines, smoking, etc., can make teeth yellow. Recently, the US MSN Health website published an article, introducing 5 homely tips to prevent yellow teeth:

1. Drink a drink with a straw. John Moon, a dentist in Half Moon Bay, California, said that drinking coffee, soda, tea and other beverages with a straw minimizes the contact between the beverage and the tooth surface, which can significantly reduce the chance of the teeth being stained by the beverage, making the teeth whiter and longer.

2. Eat teeth whitening foods after drinking red wine or coffee. Apples, like apples, are slightly sour and astringent, coupled with their rough, fiber-rich pulp, making them ideal for cleaning teeth. Chewing on apples, celery, carrots and other foods can act like a toothbrush to clean your teeth, wiping away stubborn stains on your teeth.

3. Homemade whitening toothpaste. "Particulate matter removes staining and polishes teeth, but it's not corrosive enough to damage enamel," says Jennifer Jablo, a plastic dentist in New York. A homemade whitening toothpaste made with baking powder and water, used several times a month, can remove the surface of the teeth. Tinting, whitening the teeth.

4. Choose the right lipstick. "A lipstick with a blue undertone will make your teeth appear whiter," says New York City-based makeup artist Jessica Libesguy. To make it easier to tell the difference, place three or four lipsticks with different undertones side-by-side.

5. Reduce heartburn and nausea. Edmund Hewlett, a consultant to the American Dental Association and a professor at the University of California School of Dentistry, said that the acid in the digestive system will flow back into the mouth, eroding tooth enamel like the acid in soda or sports drinks. Consult a professional doctor to control acid regurgitation.