What does albumin do in free testosterone calculations?

Albumin is a major blood protein that binds weakly to testosterone, acting as a secondary transport vehicle alongside sex hormone-binding globulin (SHBG). Because this bond is loose, albumin-bound testosterone can easily dissociate and become biologically active, contributing to your body's overall free testosterone supply. Clinicians look at your total testosterone, SHBG, and albumin together to calculate how much hormone is actually accessible to your tissues rather than just circulating in total form. It is always a good idea to review these specific biomarker breakdowns directly with your clinician during your follow-up.