Date: August 7, 2015

Description: Since testosterone levels exhibit a circadian variation with peak levels in the morning, evidence-based guidelines recommend measuring morning total testosterone (TT) levels as the initial diagnostic test for androgen deficiency.  However, it has been suggested that morning blood draw may not be necessary in older men due to a blunted circadian rhythm.  We sought to determine whether it is possible to expand the morning sampling window for measurement of TT. 

Prostate cancer is a disease that is most successfully treated when it is detected early on.  As the research community explores various methods to detecting the disease, PCEC continues to encourage men to play an active role in their health by looking to those trusted sources of prostate cancer testing – the PSA and DRE.

~Dr. E. David Crawford
Head of the Urologic Oncology Department at the University of Colorado Health Sciences Center
Founder/Chairman of PCEC

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