Methylstenbolone

Methylstenbolone (nicknames M-Sten, Methyl-Sten, Ultradrol), also known as 2,17α-dimethyl-4,5α-dihydro-δ¹-testosterone (2,17α-dimethyl-δ¹-DHT) or as 2,17α-dimethyl-5α-androst-1-en-17β-ol-3-one, is an orally active anabolic-androgenic steroid (AAS) and 17α-methylated derivative of dihydrotestosterone (DHT) that has never been introduced for medical use. It is a designer steroid and has been sold "over-the-counter" via the internet as a "dietary/nutritional supplement". Methylstenbolone is the 17α-methylated derivative of stenbolone, which is similarly androgenic but only about half as anabolic, as well as the δ¹-isomer of methasterone (2α,17α-dimethyl-DHT).