what is the difference between total testosterone and free testosterone
This is the combined total of all forms of testosterone in your body which involve three different forms; 1  Testosterone molecules bound to SHBG (Sex Hormone Binding Globulin), 2  Testosterone molecules bound to a protein called albumin, and. 3  Free testosterone which isnât bound to anything â thus, it is free.
Only 2% Free Testosterone . . . Just 2% of your total testosterone is free testosterone. That means that only 2% of the testosterone in your body is biologically active. Only 2% of your bodyâs testosterone is available to help in the muscle-building process. This goes to show you just how powerful testosterone is for building muscle.