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 | 3/10 | 3/10 |
| 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, or SARM (a drug that switches on the body's testosterone-sensing receptor in a targeted way). It is a small molecule made in a lab — not a peptide, and not an anabolic steroid. It was created as an experimental drug, was never approved…
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…