SARM / Classic SARM

Ostarine (MK-2866 / Enobosarm)

Most studied SARM. Modest anabolic effect with relatively low androgenic activity. Phase 2 trials completed for muscle wasting. NO SARM is FDA-approved — all are research compounds.

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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 dose10–30 mg/day. Maximum cycle 12 weeks.

Half-life24 hours

Risk flagmoderate

Regulatory noteResearch-only flag

Side effects and watch-outs

HPTA suppression (mild-moderate — worse at higher doses and longer cycles)
Back acne
Mild LDL elevation
Rare: visual changes (yellow tinge — less frequent than Andarine)
PCT required at doses >20 mg/day or cycles >8 weeks
Elevated liver enzymes — LFTs recommended
⚠️ ALL SARMs are RESEARCH COMPOUNDS — long-term human safety data is incomplete