The Role of Hormone Production in the Body

There is sort of this feedback loop. The hypothalamus signals gonadotropin releasing hormone to the pituitary, which then basically based on what it said with LH and FSH, produces testosterone. So we got total testosterone, which is all your testosterone combined. Free testosterone is the stuff that can actually work on your body and have that androgen effect on you. And then this SHPG is like what binds to your testosterone that makes testosterone not free testosterone.