Androsterone is also known to be an inhibitory androstane neurosteroid, acting as a positive allosteric modulator of the GABAA receptor, and possesses anticonvulsant effects. In addition, it can be converted back into DHT via 3α-hydroxysteroid dehydrogenase and 17β-hydroxysteroid dehydrogenase, bypassing conventional intermediates such as androstanedione and testosterone, and as such, can be considered to be a metabolic intermediate in its own right. It is a weak androgen with a potency that is approximately 1/7 that of testosterone. Androsterone, or 3α-hydroxy-5α-androstan-17-one, is an endogenous steroid hormone, neurosteroid, and putative pheromone.
Extensive knowledge regarding androstenedione consumption, action mechanisms for its health benefits and side effects, in addition to its pharmaco/toxicokinetics and clinical features is presented for the first time. For instance, the microbial conversion of phytosterols is being widely applied for the production of steroidal drug intermediates such as AD and 9-OHAD (9-hydroxy-4-androstene-3,17-dione) 30,31,32. Steroid hormones’ various origins in nature, including human and animal sources, septic systems, concentrated animal feeding operations, combined sewer overflows, wastewater treatment plants, and agricultural fields. Once steroid hormones are present in surface water, they are subjected to several biotransformation and removal processes, such as sorption to sediments or colloids, direct or indirect photo-degradation, and biodegradation 27,28,29. Steroidal hormones in nature, as illustrated in Figure 2, can be found in human and animal sources, septic systems, concentrated animal feeding operations, combined sewer overflows, wastewater treatment plants, and agricultural fields 24,25,26. The keywords used were "Androstenedione; health effects; toxicity; pharmacokinetics; metabolism; drug interaction; pharmacogenetics".
Effects of dehydroepiandrosterone vs androstenedione supplementation in men. The effects of ergogenic compounds on myogenic satellite cells. Brown GA, Vukovich MD, Reifenrath TA, et al. Effects of anabolic precursors on serum testosterone concentrations and adaptations to resistance training in young men.
Metabolism of androgen takes place mainly via hydroxysteroid dehydrogenases, reductases, and conjugation enzymes . Androstenedione can be synthesized from dehydroepiandrosterone and further converted into either testosterone through the action of 17β- hydroxysteroid dehydrogenase, or to estrone via the aromatase enzyme complex . For instance, androstanedione was reported to be the principal metabolite of androstenedione in human fetal epiphyseal cartilage and in human hair roots .
Leder BZ, Longcope C, Catlin DH, et al. Oral androstenedione administration and serum testosterone concentrations in young men. Effect of oral androstenedione on serum testosterone and adaptations to resistance training in young men. Androstenedione seems to increase estrogen levels in the body. So far, no such cases have been reported, but steroids similar to androstenedione have been connected to liver problems. Taking androstenedione seems to increase estrogen levels. Whereas DHT was equally potent as testosterone at preventing prostate cell death after castration.One of the 11-oxygenated androgens, namely 11-ketotestosterone, has the same potency as testosterone. A study using male rats showed that testosterone may block social isolation, which results in hippocampal neurogenesis reaching homeostasis—regulation that keeps internal conditions stable.

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