These tests are used to measure testosterone levels in men, which are important for male sexual function, muscle mass, and bone density.
Testosterone: Measures the total amount of testosterone in your blood. Sex Hormone Binding Globulin (SHBG): A protein that binds to testosterone, reducing its availability. A high SHBG level can lower free testosterone levels. Free Androgen Index (FAI): A calculation that estimates the amount of free testosterone in your blood, which is the biologically active form of testosterone. Free Testosterone: Measures the amount of testosterone that is not bound to SHBG. Albumin: A protein that can also bind to testosterone. A low albumin level can increase free testosterone levels.