Men Running (IMAGE) University of California - Santa Barbara Caption Testosterone, the hormone that puts a spring in a man's step, may also lead to benign prostate hyperplasia -- enlarged prostate -- according to a study by UCSB researchers - See more at: http://www.news.ucsb.edu/2015/015419/when-it-comes-testosterone-more-isnt-always-better#overlay-context=2015/015419/when-it-comes-testosterone-more-isnt-always-better Credit UCSB Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.