SARM / Classic SARM

Vosilasarm (ARN-509)

Full androgen receptor antagonist studied for prostate cancer. Potent anti-androgenic SARM. Used in performance context for its unique mechanism. Very limited performance use data.

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Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.

Reference doseResearch only — prostate cancer doses: 30–120 mg/day

Half-life48 hours

Risk flaghigh

Regulatory noteResearch-only flag

Side effects and watch-outs

⚠️ Androgen receptor antagonist — ANTI-anabolic at high doses
Severe HPTA suppression
Sexual dysfunction
Fatigue
Used medically to REDUCE testosterone effects — not enhance them