What are the effects of dihydrotestosterone. Dihydrotestosterone is due to the reaction between testosterone and the alpha-reductase enzyme in the body, a kind of androgen, widely distributed in the blood of the whole body, testosterone can be directly or indirectly changed into more active dihydrotestosterone, dihydrotestosterone and spermatogenic cells, androgen receptor binding, to promote spermatogenesis. So the role of dihydrotestosterone is mainly: first, to maintain spermatogenesis. Secondly, it stimulates the development of reproductive organs, promotes the appearance of male secondary sexual characteristics and maintains their normal shape. Thirdly, it maintains normal libido. The fourth is to promote protein synthesis, especially muscle and reproductive organs of protein synthesis, but also can promote the growth of bone and calcium and phosphorus deposition, the production of red blood cells.