Metandienone Wikipedia
Metandienone (also known as methyltestosterone)
A synthetic anabolic–androgenic steroid (AAS)


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1. Overview

FeatureDetails IUPAC name17‑α‑Methylnor-5β-androstan‑3‑one Molecular formulaC₂₀H₂₆O₂ Key pharmacophores17‑α‑methyl group (increases oral bioavailability), 3‑keto group, 4‑double bond removed by methylation → 5β‑steroid skeleton. Common trade namesAnabolic‑A, Testo‑Anabol, https://maintain.basejy.com/ Norbol Routes of administrationOral (tablet/capsule). No parenteral preparations due to low oral potency and rapid hepatic metabolism.

1. Mechanism of Action – From Chemistry to Physiology

Chemical FeatureBiochemical ImpactPhysiological Consequence 5β‑reduction (Δ4→Δ5) + methyl at C10Lowers the Δ4 double bond → reduces affinity for estrogen receptors, increases androgen receptor (AR) activation.Favors anabolic effects over estrogenic side‑effects