Compare · SARM
LGD-3303 vs YK-11
Both are sarm compounds. Here's how they line up on the evidence — graded the same way.
| LGD-3303 | YK-11 | |
|---|---|---|
| Evidence | Animal only | Animal only |
| Class | SARM | SARM |
| Summary | LGD-3303 is a nonsteroidal selective androgen receptor modulator (SARM), not a peptide. Its evidence is preclinical (rodent) only — there are no human trials. It is an unapproved research chemical and is banned at all times in sport. | 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 → |
LGD-3303
LGD-3303 is a nonsteroidal selective androgen receptor modulator — a SARM, and importantly a small molecule rather than a peptide. It comes from the same Ligand Pharmaceuticals program as LGD-4033 (ligandrol), but it is a separate compound and should not be confused with it. The only real evidence…
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…