Why do Japanese people have thicker tooth enamel?

Answer 1

Researchers and scientists are now begining come forward with the findings that too much fluoride actually distroys teeth by corrosion known as dental fluorosis. Some fluoride is flushed from the body, but most of it accumulates and causes your teeth and bones to become more brittle; causing skeletal fluorosis and increased rates of hip fractures in some elderly people when exposed to excessive fluoridation such as common tap water in fluoridated cities. The tap water in Japan is not fluoridated and experts suggest that because the use of fluoride in Japan is very minimal (virtually non existant), that Japanese people have stronger bones and teeth than American who use fluoride.