Andarine, also designated S-4 or GTx-007, is a non-steroidal selective androgen receptor modulator (SARM) and one of the earliest compounds in the aryl-propionamide SARM class. This listing is a research-grade reference compound supplied in powder form for in vitro and laboratory investigation. Identity and purity are third-party verified and documented by a batch-dated, downloadable Certificate of Analysis.
Identity and purity are independently confirmed by MZ Biolabs (Tucson, AZ), a US DEA Schedule III licensed analytical facility (License RP0584676), using HPLC purity analysis and mass-spectrometry identity confirmation under Good Laboratory Practice (GLP) standards to support research reproducibility.
Current certificate of analysis for Andarine (S4), dated 06/11/2026, issued by MZ Biolabs. Tap to view full size.
Open or download the current Andarine (S4) COA · View the full COA archive →
Store in a cool, dry place away from direct sunlight to maximize shelf life. Supplied in a UV-resistant foil pouch to minimize photodegradation.
Independent analysis has repeatedly found that materials sold online as SARMs are frequently mislabeled or adulterated. A 2017 JAMA investigation that chemically analyzed products marketed as SARMs found that only a minority accurately matched their labeled contents, and a substantial share contained unapproved or entirely different substances.[5] Third-party testing is the control that distinguishes a documented reference compound from an unverified one.
Andarine emerged from academic research at the University of Tennessee in the early 2000s and was licensed for development by GTx, Inc. Published pharmacodynamic work characterized its tissue-selective androgen receptor activity in castrated rat models,[1] and later studies examined muscle strength, body composition, and bone endpoints in orchidectomized rats[2] and bone mineral density and body fat in an ovariectomized rat model.[3] A separate study compared its effects on prostate weight in intact rats with those of finasteride and hydroxyflutamide.[4] Andarine was not advanced to approval, and its developer later prioritized a successor compound, enobosarm (ostarine). Its safety profile in humans has not been established.
This material is supplied strictly as a reference compound to support such laboratory investigation. It is not a therapeutic product, dietary supplement, or sports supplement, and no clinical or performance outcomes are claimed or implied for any individual.
Andarine (S4) is an investigational compound that has not been approved by the U.S. Food and Drug Administration for human use. It is not a dietary supplement, and marketing it for human ingestion is unlawful. It is supplied exclusively for laboratory research purposes.
For laboratory research use only. This preparation is not approved by the FDA for human use. Andarine / S4 is not a dietary or sports supplement and is not intended for human or animal consumption.
All products on this website are intended exclusively for research and development purposes. The statements herein have not been evaluated by the U.S. Food and Drug Administration. Neither the statements nor the products are intended to diagnose, treat, cure, or prevent any disease. Sports Technology Labs are chemical suppliers, not medical practitioners; our expertise is sourcing and quality control.
| Weight | 0.25 oz |
|---|---|
| Dimensions | 3 × 0.3 × 4 in |
