Peter Attia· MD
testosterone replacement therapy it's not as simple as looking at the total testosterone or even the free testosterone and determining if a person has low testosterone or low T and the reason for that is when you are measuring total testosterone you don't really know what the free T is... we don't know how many Androgen receptors a person has and therefore we don't know how saturated their Androgen receptors are with either testosterone or dihydrotestosterone