Compounds / Anabolic / Metribolone

Metribolone

Metribolone (R1881 — Synthetic Androgen Research Compound)

AnabolicFDA: Not approved — never intended for human...WADA: PROHIBITED — Category S1

Overview

⚠ NO HUMAN CLINICAL TRIALS — EVER. Metribolone is a laboratory research tool used as the reference standard in androgen receptor binding assays. Extreme potency makes human use extraordinarily dangerous with no therapeutic ratio established. Published literature = receptor pharmacology studies only, zero human administration studies.

Mechanism of Action

17α-methyl-trenbolone. Extremely high AR binding affinity — gold standard AR binding assay reference compound in receptor pharmacology research. AR Ki ~0.2 nM (among highest known). Also binds progesterone receptor. Used in laboratory research to study androgen receptor function, not for human administration.

Molecular Profile

Molecular weight

284.4 Da

CAS number

965-93-5

Key Research Findings

No human trials; no human use established; AR binding reference standard in research; extreme potency; lab tool only.

Published Research

J Biol Chem (2004)

Bohl CE et al. Crystal structure of the T877A human androgen receptor with bound DHT

View source

Related Anabolic Compounds

Testosterone Cypionate Testosterone Enanthate Testosterone Propionate Testosterone Suspension Sustanon (Testosterone Blend)Nandrolone Decanoate

Clinical Guidance

Research data is not a treatment plan. If you are considering Metribolone, the questions that matter are whether it suits your history, your labs and your goals. That is a conversation with a licensed physician, not a lookup.

Speak with a physician LATOM Wellness is a physician-led telehealth practice. Consultation only. No compound is sold on this site.

Running Metribolone? Log doses and track your cycle.

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