Endocrine Abstracts

Objective: The majority of circulating testosterone is bound to sex hormone-binding globulin (SHBG), but also to albumin and cortisol-binding globulin. The remaining part is free-circulating testosterone unattached to serum proteins, which represents the active form of the hormone. A common measurement of the free testosterone is the calculated free testosterone index (FTI)=100*(total testosterone/SHBG). Testosterone is the principal male sex hormone and is involved in the reg...