Dartmouth Medical School investigators are learning more about how low doses of arsenic, such as the levels found in drinking water in many areas of the United States, affect human physiology. In a paper published online on Dec. 2 in the journal Chemical Research in Toxicology, the researchers report that three different steroid hormones all show similar responses to arsenic, suggesting a broader effect and a common mechanism of arsenic on how these hormones function.<br><br><a href='http://www.dartmouth.edu/~news/releases/2006/12/04.html&#039; target='_blank'>http://www.dartmouth.edu/~news/releases/2006/12/04.html&lt;/a&gt;&lt;br&gt;&lt;br>