Diagnostic Blood Test:

Total Testosterone (LC/MS)
Free Testosterone (Equilibrium Dialysis)

Testosterone is the primary sex hormone in men and plays important roles in women. Low testosterone levels may play a role in erectile dysfunction, decreased sex drive, muscle loss, weak bones, hair loss, fatigue, depression, memory problems, heart disease, and even earlier death.
Optimal testosterone levels may lead to increased muscle mass and strength, higher endurance, enhanced libido, improved mood, lower cholesterol levels, increased bone mineral density, improved cognition and memory, better sleep, and a healthier metabolism.

Total Testosterone test is a measure of the total amount of testosterone hormone in the blood.

Free Testosterone is a measure of unbound testosterone that is available to the body’s tissues.