High levels of 5AR activity are present in androgenic tissues Turinabol tabs the prostate but are undetectable in skeletal muscle (15). As such, in skeletal muscle, testosterone directly binds androgen receptors contributing to muscle growth. However, in prostatic tissues and hair follicles, testosterone is converted to DHT by 5AR and is thus responsible for the known side effects of testosterone supplementation therapy (TST) on prostate growth and Oral-Turinabol (15). This reduced form of nandrolone has a significantly decreased binding affinity for the androgen receptor compared to its parent steroid, testosterone (15). Theoretically, the end result could be a decrease in prostatic growth with a possible and theoretical effect on lower urinary tract symptoms such as those developed as a result of benign prostatic hyperplasia (BPH). A potential decrease in the rates of alopecia could also be observed. Furthermore, Tbol, the lack of 5AR in skeletal muscle allows nandrolone to bind strongly to androgen receptors in the muscle and stimulate growth, contributing to its high myotrophic:androgenic ratio (15). The metabolism of nandrolone is incompletely understood. Metabolites of nandrolone include 19-norandrosterone and 19-noretiocholanolone glucuronides that are detectable in urine (16). TST in hypogonadal men results in elevated levels of free serum testosterone and, in turn, DHT. This occurs due to conversion of testosterone to DHT via 5AR inhibitors (5ARi) (19,20).