Primary entity: S-23Also known as: S23; S 23Class: performance-adjacent literacy (see page)Cluster: Performance-adjacent
S-23 is an investigational selective androgen receptor modulator named among example SARMs on the WADA Prohibited List. It is not a peptide, not FDA-approved, and should not be treated as a researched male contraceptive medicine for consumers — animal reproductive findings are not an approved birth-control indication.
S-23 is not a peptide. It is a nonsteroidal SARM (AR ligand).
Not FDA-approved. WADA: S-23 listed among S1.2 SARM examples. Gray-market physique use is unapproved self-experimentation.
Key takeaways
- Not a peptide — investigational SARM.
- Not FDA-approved; WADA S1.2
- Fertility/contraception forum claims are not approved indications — treat as animal-model myth risk.
- No dosage / PCT charts.
Questions this page answers
Next questions we answer on this page (curiosity / AI-gap map):
- What is S-23?
- Aliases
- Classification
- What it is NOT
- Mechanism
- Evidence ladder
- What has been studied
- Safety / fertility literacy
- Regulatory & WADA
- Why no dosages
- Related
- Who for / not for
Who is this profile for — and who is it not for?
For: readers decoding S-23 “hard SARM / contraceptive” forum threads.
Not for: protocol or contraceptive seekers.
What is S-23?
S-23 is a research SARM with preclinical reproductive and anabolic literature that forums exaggerate into “male birth control” narratives. Literacy rule: animal reproductive effects ≠ approved contraceptive drug.
| Chemistry class | Nonsteroidal SARM |
|---|---|
| Peptide? | No |
| U.S. approval | Not approved |
| Sport | WADA S1.2 example |
| Forum myth | “Male contraceptive” — not an approved use |
Also known as
- S-23 / S23 — research designation.
- Mis-tags: “S-23 peptide.”
There is no approved S-23 contraceptive medicine. Preclinical reproductive findings must not be turned into consumer family-planning advice.
How is S-23 classified?
Investigational SARM — unapproved anabolic agent under WADA.
What is S-23 not?
| S-23 is not… | Why that matters |
|---|---|
| A peptide | SARM |
| FDA-approved contraceptive | No such approval |
| FDA-approved physique drug | No |
| Something we dose | Refusal |
How is S-23 thought to work?
Androgen-receptor selective modulation — SARM class thesis. Reproductive-axis effects in animals reflect AR biology, not a green-lit contraceptive program for readers.
What human vs animal vs label evidence exists?
| Evidence type | What exists (summary) | Maturity |
|---|---|---|
| Human approved development | No approved product | None |
| Animal | Anabolic / reproductive preclinical models | Animal |
| Forum contraceptive claims | Myth amplification | None |
Do not publish fertility-rate statistics from unverified forum summaries.
What has S-23 been studied for?
Preclinical anabolic and reproductive research themes. Studied in animals ≠ approved human use.
What safety topics come up?
SARM class risks (HPTA suppression, lipids, liver case-report themes) plus reproductive toxicity concerns from animal work — which is exactly why “DIY contraceptive” talk is dangerous literacy failure. Not medical advice; seek clinicians for fertility questions.
What is S-23's regulatory status?
- U.S.: Not FDA-approved.
- WADA: S-23 named under S1.2 SARMs
- Supplements: Not a lawful SARM dietary ingredient.
Why doesn't this page include a dosage chart?
Refused — includes refusal of fertility “protocols.”
Related lab literacy
Not peptide reconstitution.
Related compounds and comparisons
Frequently asked questions
Is S-23 a peptide?
No.
Is S-23 a male contraceptive?
Not an approved medicine. Animal findings are not consumer birth-control guidance.
Is it WADA banned?
Listed under S1.2 SARMs.
Why no dosage chart?
Unapproved anabolic / reproductive self-experimentation refusal.
Not a peptide, not an approved contraceptive, WADA-relevant. Disclaimer..
Sources
The sources below were checked against PubMed, DailyMed, or the official agency page on November 10, 2026 (America/Phoenix). Links go to the publisher, PubMed, or the agency record.
- Primary — animal Jones A, Chen J, Hwang DJ, Miller DD, Dalton JT. Preclinical characterization of a (S)-N-(4-cyano-3-trifluoromethyl-phenyl)-3-(3-fluoro, 4-chlorophenoxy)-2-hydroxy-2-methyl-propanamide: a selective androgen receptor modulator for hormonal male contraception. Endocrinology. 2009. doi:10.1210/en.2008-0674. PMID: 18772237. This paper characterizes S-23 in rats; it is not a human contraceptive trial.
- Regulatory U.S. Food and Drug Administration. FDA Warns of Use of Selective Androgen Receptor Modulators (SARMs) Among Teens, Young Adults. Accessed November 10, 2026.
- Anti-doping World Anti-Doping Agency. The World Anti-Doping Code International Standard Prohibited List 2026. Accessed November 10, 2026. Confirm the current list and GlobalDRO before relying on sport status. The 2026 list names S-23 as a SARM example under S1.2.
- Written by
- Peptide Tutorials Staff — a group of independent researchers & writers (not clinicians)
- Published · Updated
- Oct 7, 2026 · Oct 7, 2026 · Regulatory and sport-status wording checked November 10, 2026 against current FDA labels and the 2026 WADA Prohibited List · How we source & update
Educational disclaimer: Educational only. S-23 is not a peptide and is not FDA-approved. No dosing, fertility protocols, or buy links. We don't sell peptides. Read our full disclaimers.