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About Us

Performance Clinics are World's premium quality sports research product suppliers. Our products are the highest quality / purity on the market, produced in the most sophisticated and highly regulated US facilities available and tested by World's most trusted quality assurance analysts with quality reports available on request.

We provide research only products to our clients and ensure access to the best quality product at a fraction of the price available to research specialists elsewhere. Please read our product usage disclaimer before deciding whether or not our products are suitable for your research project.

S-23 (Swole)


in stock


Product name: S-23

Short name: Swole

Molecular Formula: C18H13ClF4N2O3

Concentration: 25mg/ml

Volume: 30ml

Cycle length: 4 weeks

PCT required: Yes

S-23 is an new generation selective androgen receptor modulator(SARM) that was originally developed by GTX, Inc as a potential male hormonal product. S-23 binds to the androgen receptor with more strength than older compounds such as S-4 or MK-2866. With a Ki of 1.7 nM, and in studies it has showed both a good ratio of anabolic to androgenic effects.

Due to it’s strength and effectiveness S-3 has become a recent compound of choice for practitioners seeking to achieve significant mass including muscle mass, bone density and lean growth as an overall outcome / objective.

Note: All PC International products are for research purposes only. No statements made on this website or blog have been evaluated by your local or international administrative or regulatory body as our products are strictly for research purposes only. All products for sale are intended for laboratory and research use. All buyers must be a minimum of 18 years to purchase these products. These products are not intended to treat, cure or prevent any disease or illness. Please refer to our product use and disclaimer for more information.

About Us

Performance Clinics are World’s premium quality sports research product suppliers.

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