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Low Testosterone Not Normal Part of Aging, University of Adelaide Study  
6/27/2012 7:12:08 AM

A drop in testosterone levels in men as they age is more likely to result from smoking, obesity and depression -- not aging, researchers in Australia say. Dr. Gary Wittert, professor of medicine at the University of Adelaide in Adelaide in Australia, and colleagues analyzed testosterone levels in more than 1,500 men who had measurements taken at two clinic visits five years apart. Men who had abnormal values, were taking medications or had medical conditions known to affect hormones, were excluded.
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