<unk>  <unk> , 5α-dihydrotestosterone, 5α-DHT, androstanolone or stanolone) is an endogenous androgen sex steroid and hormone. The enzyme 5α-reductase catalyzes the formation of<unk>  from testosterone in certain tissues including the prostate gland, seminal vesicles, epididymides, skin, hair follicles, liver, and brain. This enzyme mediates reduction of the C4-5 double bond of testosterone. Relative to testosterone,<unk>  is considerably more potent as an agonist of the androgen receptor (AR). In addition to its role as a natural hormone,<unk>  has been used as a medication, for instance in the treatment of low testosterone levels in men; for information on<unk>  as a medication, see the androstanolone article.
Dihydrotestosterone
Methyltestosterone
3β-Androstanediol
3α-Androstanediol
Allyltestosterone
Dehydroepiandrosterone
11-Ketoprogesterone
16α-Hydroxyestrone