This test measures the amount of both testosterones bound to proteins (sex hormone-binding globulin and albumin) and free (not bound to any proteins) testosterone in the blood.

Testosterone is a hormone mainly produced by the testes in men, or ovaries in women. Testosterone’s diverse range of effects on many different organs and tissues includes bone health building and maintaining muscle mass and strength; increasing lean body mass and fat loss; increasing red blood cell production; improving libido and sexual function, increasing sperm production, regulating mood, brain function and memory.

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