Why are African teeth so white?

1, genetic advantage: whether teeth are white or not is mainly related to the color of dentin. The enamel wrapped around the tooth is transparent, so the external color of the tooth is the color of the dentin that passes through the enamel. The dentin of Asian teeth is light yellow, while the dentin of Africans is lighter than that of Asians, which is determined by genes, and with the background of dark skin, it will be particularly white.

2. There is a branch of a plant in Africa, which is about the thickness of the little finger, cut into about ten centimeters long and ground in the mouth all day, that is, with a toothpaste toothbrush. Many people also like to grind their teeth with this branch, and their teeth are white and bright.

3. Eating habits: African people's diet is very simple and pure, basically natural food. Preservatives, thickeners, colorants and sweeteners commonly used in China are extremely rare in Africa, and the additives harmful to teeth are much less than those in China.