Is free testosterone more important than total testosterone for TRT?

While total testosterone is the most common metric, free testosterone is often more important because it represents the 'bioavailable' hormone actually able to exert cellular effects. If your total testosterone is normal but your free testosterone is low, it is often due to high levels of Sex Hormone-Binding Globulin (SHBG) or albumin binding up the hormone. At HeydayMD, our clinicians look at your complete hormonal profile—including SHBG and free T—to ensure your protocol is optimized for how you actually feel, not just a single number on a page.