<unk>  is a natural steroid prohormone produced from cholesterol by the adrenal glands, the gonads, adipose tissue, brain and in the skin (by an autocrine mechanism).<unk>  is the precursor of androstenedione, which can undergo further conversion to produce the androgen testosterone and the estrogens estrone and estradiol. The physiologic significance of<unk>  is not yet proven and supplementation is not yet approved by FDA.
Dehydroepiandrosterone
Testolactone
Dihydrotestosterone
Methyltestosterone
17-Hydroxyprogesterone
19-Norandrosterone
Estradiol 
Androgen