This is what is referred to as “free testosterone.”. The total of both your protein-bound testosterone and free testosterone is known as “ bio-available testosterone .”. While both bound and free testosterone is available, it is only the free one that is immediately accessible for use by your body. The molecules of free testosterone can
Using data from the Testosterone Trials, we assessed the association of changes in total testosterone, estradiol, and DHT levels over 12 months of testosterone treatment with hemoglobin, high-density lipoprotein (HDL) cholesterol, volumetric bone mineral density (vBMD) of lumbar spine, sexual desire, and prostate-specific antigen (PSA).reported an age-adjusted relative risk (RR) for high vs. low levels of serum total testosterone of 3.4 [95% confidence interval (CI), 1.6–7.3] and for urinary testosterone of 2.1 (95% CI, 0.9–4.8) for cases (n = 63) vs. controls (n = 70). Study samples were collected between cycle d 18 and d 21 irrespective of cycle length or whether AC0l7Pv.