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19-Nordehydroepiandrosterone (19-nor-DHEA), or 19-nor-5-dehydroepiandrosterone (19-nor-5-DHEA), is an estrane (19-norandrostane) steroid which was never marketed. [ 1 ] [ 2 ] It is the combined derivative of the androgen / anabolic steroid nandrolone (19-nortestosterone) and the androgen prohormone dehydroepiandrosterone (DHEA, or more ...
19-Norandrosterone, also known as 5α-estran-3α-ol-17-one, is a metabolite of nandrolone (19-nortestosterone) and bolandione (19-norandrostenedione) that is formed by 5α-reductase.
19-Nor-5-androstenedione, also known as estr-5-ene-3,17-dione, is a synthetic, orally active anabolic-androgenic steroid (AAS) and a derivative of 19-nortestosterone ...
Prasterone, also known as dehydroepiandrosterone (DHEA) and sold under the brand name Intrarosa among others, is a medication as well as over-the-counter dietary supplement which is used to correct DHEA deficiency due to adrenal insufficiency or old age, as a component of menopausal hormone therapy, to treat painful sexual intercourse due to vaginal atrophy, and to prepare the cervix for ...
Levels of DHEA-S in circulation are approximately 250 to 300 times those of DHEA. [20] DHEA-S in turn can be converted back into DHEA in peripheral tissues via steroid sulfatase (STS). [54] [55] The terminal half-life of DHEA is short at only 15 to 30 minutes. [56] In contrast, the terminal half-life of DHEA-S is far longer, at 7 to 10 hours. [56]
Dehydroepiandrosterone (DHEA), DHEA sulfate (DHEA-S), and androstenedione may all be considered proandrogens of testosterone. [ 1 ] In the last two decades, prohormones have also been used by bodybuilders, athletes, and nonmedical users of AAS and other hormones to refer to substances that are expected to convert to active hormones in the body.
DHEA and DHEA-S are the most abundant circulating steroids in the body. [29] Plasma levels of DHEA-S are 100 or more times higher than those of DHEA, 5 to 10 times higher than those of cortisol, 100 to 500 times those of testosterone, and 1,000 to 10,000 times higher than those of estradiol. [30] [3] Levels of DHEA and DHEA-S vary throughout life.
Currently, the National Institute for Health and Care Excellence (NICE) of England's National Health Service (NHS) uses cost-effectiveness studies to determine if new treatments or therapies at the prices proposed by manufacturers provide better value relative to the treatment that is currently in use. With the number of cost-effectiveness ...