This video was produced for the American Urology Association.

John P. Mulhall, MD discusses the differences between Low Testosterone and Testosterone Deficiency.  He teaches us that Low Testosterone is simply the measurement of the Testosterone in the body, called serum testosterone.  Testosterone Deficiency is really a combination of the presence of symptoms AND measurement of the Testosterone in the body.   Testosterone Deficiency cannot be determined by either symptom or by serum testosterone levels alone.

The symptoms that are part of Testosterone Deficiency are

Low Energy


Decreased Endurance

Losing Muscle

Central Obesity



Erectile Dysfunction

Low Sex Drive

You can read the full guidelines and learn more about Testosterone Deficiency and Low Testosterone here at Viking.