资讯

Fluoride is safe and beneficial in appropriate amounts, aiding in cavity prevention. However, excessive intake can have harmful effects, particularly in countries with naturally high fluoride ...
Tucson does not add fluoride to its drinking water and remains one of six major U.S. cities without optimally fluoridated tap water. The government lowered the recommended level to 0.7 milligrams ...
The UEFA EURO U21 tournament in Slovakia has been a great place to watch so many of the world’s best young players. England are the reigning champs and the likes of Ethan Nwaneri, James McAtee, Tino ...