Compare · SARM
Ostarine vs YK-11
Both are sarm compounds. Here's how they line up on the evidence — graded the same way.
| Ostarine | YK-11 | |
|---|---|---|
| Evidence | 7/10 | 3/10 |
| Class | SARM | SARM |
| Summary | Ostarine is an investigational selective androgen receptor modulator (SARM) — not a peptide — with real but limited human evidence for lean-mass effects, no regulatory approval anywhere, and documented liver-injury and hormone-suppression signals. | YK-11 is a synthetic steroidal SARM marketed for muscle growth, but its claimed human benefits rest entirely on cell-culture data — there are no human trials, and it is an unapproved drug banned in sport. |
| Full profile → | Full profile → |
Ostarine
Ostarine (also called MK-2866 or enobosarm) is a selective androgen receptor modulator (a compound designed to act like a muscle-building hormone in some tissues but not others). It is often — and wrongly — sold online as a "safer steroid alternative" for building muscle. It is not a peptide, and…
YK-11
YK-11 is a lab-made compound sold as a SARM (selective androgen receptor modulator — a drug designed to switch on the body's muscle-building signals) and pitched as a way to add muscle. The marketing aside, it is not a peptide. It is a steroid-style molecule built on a 19-norandrostane backbone (a…