Does low free testosterone cause low libido and erectile dysfunction?

Yes, low free testosterone is often a more accurate predictor of symptoms like low libido and erectile dysfunction than total testosterone alone, as free T represents the hormone actually available for your tissues to use. When SHBG is high, it can bind up too much testosterone, leaving you with 'normal' total levels but the symptoms of a deficiency. At HeydayMD, we prioritize optimizing free testosterone levels to ensure patients see real improvements in sexual health and drive. If you're struggling with these symptoms despite a normal total T reading, it's essential to look at the full picture of your androgen profile.