Jane Says: Consider Where Your Eggs Are From, Not Their Color. A yolk is a yolk is a yolk is a yolk, regardless of its hue. Feed mixed with marigolds or paprika lends its tone to henâs eggs. (Photo: Mike Harrington/Getty Images)
The normal range of testosterone levels in healthy adult males is between 280 to 1,100 nanograms per deciliter (ng/dL), reports the University of Rochester Medical Center. Itâs important to determine if a low testosterone level is due to normal aging or if itâs due to a disorder.
Testosterone is the main sex hormone in men, produced mainly by the testicles, and is responsible for male physical characteristics. Although it is considered to be a male sex hormone, it is present in the blood of both males and females. Typically, a test for total testosterone is used for diagnosis. The total testosterone test measures testosterone that is bound to proteins in the blood (e.g., albumin and sex-hormone binding globulin [SHBG]) as well as testosterone that is not bound (free testosterone).