The illicit anabolic steroid market includes steroids that are not commercially available in the . as well as those which are available. Steroids that are commercially available in the . include fluxoymesterone (Halotestin® ), methyltestosterone, nandrolone (Deca-Durabolin® , Durabolin ® ), oxandrolone (Oxandrin® ), oxymetholone (Anadrol® ), testosterone, and stanozolol (Winstrol® ). Veterinary steroids that are commercially available in the . include boldenone (Equipoise® ), mibolerone, and trenbolone (Revalor® ). Other steroids found on the illicit market that are not approved for use in the . include ethylestrenol, methandriol, methenolone, and methandrostenolone.
As a non-aromatizing androgen, dihydrotestosterone is extremely potent. Aromatization refers to the conversion of testosterone or anabolic steroids into estrogen. High estrogenic activity causes bloating, acne, water retention and oily skin. As dihydrotestosterone does not aromatize even at high dosages, users do not face the aforementioned side-effects. Lack of water retention also has a hardening effect on muscle tissue, in bodybuilders. Being a powerful androgen, dihydrotestosterone is also responsible for a shift in the estrogen-testosterone ratio in the body. Due to its predominant androgenic component, the steroid has a stimulating effect on the adreno-pituitary functions, and causes neurological excitation in the ‘sexual orientation areas of the brain’. This in turn, spikes sex drive in males.