Compare · SARM
Ostarine vs S23
Both are sarm compounds. Here's how they line up on the evidence — graded the same way.
| Ostarine | S23 | |
|---|---|---|
| Evidence | 7/10 | 3/10 |
| 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. | S23 is a synthetic selective androgen receptor modulator (SARM) — not a peptide — studied only in rodents as a male contraceptive candidate. There are no human trials, and it is an unapproved drug banned in sport. |
| Full profile → | Full profile → |
Ostarine
Ostarine (also called MK-2866 or enobosarm) is a selective androgen receptor modulator (a compound designed to act like a muscle-building hormone in some tissues but not others). It is often — and wrongly — sold online as a "safer steroid alternative" for building muscle. It is not a peptide, and…
S23
S23 is a lab-made drug in a family called SARMs (selective androgen receptor modulators — molecules that switch on the same cell "docking points" as testosterone, but only in certain tissues). It is not a peptide. The idea behind it was to build up muscle and bone while having relatively little…