Yet another reason to swim in a lake: researchers at NYU have found that improperly chorinated swimming pools can take a toll on your teeth. Futurity reports that rexearchers at the school have documented the case of a 52-year-old man who suffered from “extremely sensitive teeth,†dark staining, and rapid enamel loss over a very short five-month period beginning in May 2010. The researchers concluded that the enamel loss was a direct result of the patient’s 90 minute swimming exercise routine he had started earlier that summer. Their findings suggest that improper pool chlorination was responsible for the patient’s dental erosion. Futurity reports that the Center for Disease Control and various dental journals have reported on similar cases of dental enamel erosion caused by improper.swimming pool chlorination,