Brick tea was a kind of necessary foods for minority nationality in China, but because of the physiological characteristic of adsorption and accumulation fluoride in tea plant (Camellia sinensis L.

• 黑茶是我国重要的茶类之一，但由于茶树具有吸收和聚积氟元素的生理特性，许多黑茶产品的氟含量较高，长期饮用已经在民族地区造成了慢性“氟中毒”。