Compare · SARM
Ostarine vs Testolone
Both are sarm compounds. Here's how they line up on the evidence — graded the same way.
| Ostarine | Testolone | |
|---|---|---|
| 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. | 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. |
| 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…
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…