Testosterone Total Blood Test, Male Only
The Testosterone Total Blood Test, Male Only measures Testosterone levels in the blood
Testosterone is the most abundant androgen. It is secreted by the testicular Leydig cells. In addition to its hormonal activity, testosterone is a prohormone that can be converted to dihydrotestosterone, a powerful androgen, and estradiol, an estrogen.
Testosterone circulates almost entirely bound to transport proteins: Normally less than 1-2% is free. The principal transport protein for testosterone is known as sex hormone binding globulin (SHBG) or testosterone-estradiol binding globulin (TeBG). Testosterone measurements are used to assess erectile dysfunction, infertility, gynecomastia, and osteoporosis and to assess hormone replacement therapy.
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