Compare · SARM
Testolone vs YK-11
Both are sarm compounds. Here's how they line up on the evidence — graded the same way.
| Testolone | YK-11 | |
|---|---|---|
| Evidence | Animal only | Animal only |
| Class | SARM | SARM |
| Summary | An investigational, non-approved selective androgen receptor modulator (SARM) with no published human efficacy evidence for fitness use, a documented serious liver-injury case, and prohibited status 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 → |
Testolone
Testolone (RAD-140) is a selective androgen receptor modulator (SARM) — a non-steroidal small molecule, not a peptide and not an anabolic steroid. It was developed as an investigational drug, never approved for any use, and is widely sold online for muscle building despite the complete absence of…
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…