Description
Overview
Marketed as a SARM but structurally a steroidal compound; reported to affect follistatin/myostatin signaling.
Composition / Profile
- Active compound: YK-11
- Drug class: Myostatin-pathway / partial androgen modulator
- Pack / dose (this listing): 60tab / 10mg
Format
- Oral capsule/tablet or liquid
- Pack / dose: 60tab / 10mg
Dosage & Usage Patterns
- Bodybuilding (commonly cited): Commonly cited: ~5–10 mg/day; limited human data; structurally steroid-like.
- Clinical / general reference: No established human dose; research compound with little data.
- Half-life: Short (uncertain).
- Protocols vary by individual, compound stack, and bloodwork — figures above reflect community-reported patterns, not medical recommendations.
Effects
Reported benefits (commonly cited)
- Myostatin-pathway modulation claimed.
- Lean mass gains reported.
- Suppression and possible hepatotoxicity.
Reported side effects
- Testosterone suppression, possible hepatotoxicity (steroidal structure), joint/tendon complaints reported.
Key Interactions
- Androgen-receptor and possible hepatic activity.
Suppression / Recovery Considerations
- Suppresses the HPTA.
Precautions
- Essentially no human safety data.
- Structurally more steroid-like than true SARMs.
Common Misconception
Myth: ‘YK-11 is a non-steroidal myostatin inhibitor.’
Evidence: it’s a steroidal compound and its ‘myostatin inhibitor’ billing is oversimplified.
Related Categories
- Browse more in SARMs → YK-11.
- Related: Post Cycle Therapy (PCT).
Storage
- Store in a cool, dry place away from direct light and moisture






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