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 | Preliminary human | Animal only |
| 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 (MK-2866 / enobosarm) is a selective androgen receptor modulator that is frequently — and incorrectly — sold on the gray market as a "safer steroid alternative" for muscle building. It is not a peptide and not a dietary-supplement ingredient. There is genuine human evidence that it raises…
YK-11
YK-11 is a synthetic compound sold as a SARM (selective androgen receptor modulator) and promoted for muscle growth. Despite the marketing, it is not a peptide — it is a steroidal molecule built on a 19-norandrostane backbone. Its reputation as a uniquely powerful "myostatin-inhibiting SARM" rests…