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Bioavailable Testosterone Fractions

Meaning

This clinical term precisely defines the portion of total circulating testosterone that is not tightly bound to sex hormone-binding globulin (SHBG) and is therefore readily available to diffuse into target tissues. Bioavailable Testosterone Fractions encompass both free testosterone and the testosterone loosely bound to albumin, collectively representing the physiologically active pool. Assessing these specific fractions provides a more accurate picture of a patient’s true androgenic status than merely measuring total testosterone alone, which can be misleading.