Ostarine (Synonyms: MK-2866, GTX-024, Enobosarm)
Ostarine (MK-2866) is a non-steroidal agent with anabolic activity. This enobosarm is a selective androgen receptor modulator (SARMs) that regulates cardiomyocyte function, improves bone healing, regulates uterine function, and influences muscle tissue metabolism. Selective androgen receptor modulator (SARM) GTx-024 is designed to work like testosterone, thus promoting and/or maintaining libido, fertility, prostate growth, and muscle growth and strength. Mimicking testosterone's action, this agent may increase lean body mass, thereby ameliorating muscle wasting in the hypermetabolic state of cancer cachexia.
Ostarine is an investigational drug and therefore not approved for any use by the Therapeutic Goods Administration (TGA). Despite this, it is still sometimes found in dietary supplements, particularly those marketed for bodybuilding. Ostarine for sale, along with other SARMS, is strictly prohibited at all times by Sport Integrity Australia and the World Anti-Doping Agency (WADA).
Chemical Properties
Molecular Weight: 389.33
Formula: C19H14F3N3O3
Cas No: 841205-47-8
Relative Density: 1.41 g/cm3 (Predicted)
Product Information
Purity: 99.90%
Appearance: Solid, liquid, powder.
Targets & IC50: Androgen receptor:3.8 nM(Ki)
Synonyms: MK-2866, GTX-024, Enobosarm
MK 2866 In Vitro
Compared to any non-steroidal androgen receptor (AR) agonists, Ostarine exhibits the highest androgenic and anabolic activity in the body, particularly affecting the prostate, seminal vesicles, and levator ani muscle, with ED50 values of 0.12, 0.39, and 0.03 mg/day, respectively. This makes it four times more effective on the levator ani muscle than testosterone propionate. At a low dose of 0.03 mg/day, Ostarine demonstrates effective and selective activity in anabolic tissues. Following a single intravenous injection of 10 mg/kg, Ostarine presents a slow decline in plasma concentration with a longer half-life of 6 hours, compared to the 2.6-4.0-hour half-life when targeting other cyan/nitro-substituted Selective Androgen Receptor Modulators (SARMs). In castrated male rats, Ostarine shows significant androgenic and anabolic activity, more effectively stimulating growth in the prostate, seminal vesicles, and levator ani muscle than other cyan/nitro-substituted SARMs. Ostarine facilitated recovery of prostate weight by 39.2% and seminal vesicle weight by 78.8% and notably stimulated levator ani muscle growth beyond other male organs to 141.9%.
MK 2866 In Vivo
Ostarine (10 nM) modulates the transcriptional activity of the androgen receptor (AR) in CV-1 cells co-transfected with human androgen receptor expression vectors, luciferase reporter vectors, and β-galactosidase control vectors. Ostarine binds to the androgen receptor with the highest affinity among selective androgen receptor modulators (SARMs), exhibiting a Ki value of 3.8 nM.
What Is Ostarine MK-2866?
Ostarine (MK-2866), also known as enobosarm, is a selective androgen receptor modulator (SARM). It binds selectively to androgen receptors in muscle and bone tissue. As a research compound, it is studied for its role in understanding muscle preservation, bone density modulation, and androgen receptor signaling.
It is not approved for human consumption by the TGA or any other regulatory body. All products on this site are supplied for laboratory and in vitro research use only.
Product Options
| Form | Concentration | Size |
|---|---|---|
| Capsule | 10mg / 20mg | 60 ct |
| Liquid | 25 mg/mL | 30 mL |
| Powder | Raw | 1 g / 5 g |
Ostarine Capsules: Pre-measured, convenient, and consistent. Ideal for structured research protocols. Available in multiple strengths.
Ostarine powder in bulk format for researchers requiring flexibility in measurement and formulation. Highest value per gram.
Ostarine Liquid Ready-to-use solution for precise volumetric measurement. Available in 20mg/mL, 25mg/mL, and 30mg/mL concentrations.
All forms are manufactured to pharmaceutical-grade standards with concentration accuracy within ±5% of stated value.
Why Researchers Choose This Source
Independent COA Verification Every batch is tested by a third-party accredited laboratory. Certificates of Analysis are available on request prior to purchase.
Domestic AU stock ships from within Australia. No customs delays. Tracked dispatch to all states and territories, including NT and WA.
Verified Purity Pharmaceutical-grade MK-2866. Each batch is HPLC-tested for identity, purity, and concentration.
Discreet Packaging: Plain, unmarked packaging with no identifying exterior labeling.
Consistent supply stock maintained year-round. No backorder delays on core SKUs.
Who Is This Suitable For?
This product is supplied exclusively to:
- Licensed laboratory researchers
- In-vitro research projects studying androgen receptor mechanisms
- Academic and independent researchers sourcing reference compounds
- Qualified professionals operating under applicable regulatory guidelines
Not for human or animal consumption. Researchers are responsible for compliance with all applicable Australian laws and institutional requirements.
Compliance & Legal Notice
Ostarine MK-2866 is a Schedule 4 substance under Australian law. It may not be imported, exported, or used without appropriate authorization. This product is supplied solely for in vitro and laboratory research purposes. Buyers accept full responsibility for compliance with TGA regulations and all relevant state and federal legislation.
Frequently Asked Questions
Is it legal to buy Ostarine in Australia? Ostarine is a Schedule 4 substance in Australia. Purchase and possession require appropriate research authorization. Buyers are solely responsible for ensuring compliance with TGA regulations and applicable state law.
How is Ostarine shipped in Australia? All orders are shipped from within Australia in discreet, plain packaging. Standard and express shipping options are available at checkout.
Do you provide a certificate of analysis? Yes. Every batch is third-party tested. COAs are available on our Lab Testing page and can be requested directly for any product before purchase.
What forms of MK-2866 are available? Ostarine is available in capsule, liquid, and raw powder form. Each is independently COA-verified before dispatch.
What concentration of liquid Ostarine should I order? This depends on your research protocol. We offer 20 mg/mL, 25 mg/mL, and 30 mg/mL. Higher concentrations reduce the volume required per measured unit.
Does the product ship from within Australia? Yes. All stock is held domestically and dispatched from Australia, eliminating international customs risk and reducing delivery times.
How is purity verified? Each batch undergoes third-party HPLC testing. A Certificate of Analysis is available upon request before any purchase is completed.
What is the minimum order? Single-unit orders are accepted. No minimum quantity is required for standard SKUs.
How long does delivery take? Orders are dispatched within 1 business day. Standard delivery across Australia typically takes 3–5 business days. Express options are available.
Order MK-2866 for Research
All orders are processed with same-day or next-business-day dispatch. COA available on request. Tracked shipping to all Australian states and territories.
Ready to order? Browse the full range of Ostarine products and place your order today. All formats are in stock and ready to ship.
For laboratory and in vitro research use only. Not for human or animal consumption.