Bioavailable testosterone measures the fraction of testosterone that is not tightly bound to SHBG and is available for tissues to use. It includes free testosterone plus the loosely albumin-bound fra…
Category: Hormones
Also known as: bioavailable testosterone, testosterone bioavailable, bio-t, bat, biot
Reference range: 110–575 ng/dL (Source: ABIM)
Standard unit: ng/dL
High values may indicate
High bioavailable testosterone may indicate androgen excess conditions such as polycystic ovary syndrome (PCOS) in women, anabolic steroid use, adrenal or gonadal tumors, or low SHBG states.
Low values may indicate
Low bioavailable testosterone may indicate hypogonadism, aging-related decline, pituitary disorders, or conditions that increase SHBG, and can cause fatigue, low libido, and reduced muscle mass.