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.
The men they included had an average age of 54 (range was 35 to 80 years). They found that the average testosterone level fell by an insignificant 1% a year between the first sampling and the second, five years later.