MK-2866 (Ostarine) | 100 x 10mg

Ostarine (MK-2866) / Frequently Asked Questions

1. What is Ostarine (MK-2866)?

Ostarine, also known as MK-2866 or Enobosarm, is a Selective Androgen Receptor Modulator (SARM) developed to mimic some effects of testosterone in muscle and bone tissue.
In research settings, it’s studied for its potential to support muscle retention, lean mass, and bone health without the androgenic effects of traditional steroids.

2. Is Ostarine legal to buy in the UK?

Ostarine is not licensed for human use in the UK or EU.
However, it is legal to purchase and possess for laboratory research when supplied by registered research-chemical vendors.
Max Muscle Labs supplies Ostarine strictly for research purposes only, in accordance with UK and EU compliance standards.

3. What purity level does your Ostarine have?

Each batch of MK-2866 is independently tested using HPLC (High-Performance Liquid Chromatography) to confirm purity, typically above 99%.
You can verify your specific bottle by checking the batch number printed on the bottom and viewing its COA (Certificate of Analysis) on our COA page.

4. How do researchers store Ostarine correctly?

For research stability, Ostarine should be stored:

• In a cool, dry environment (ideally 2-8 °C)
• Away from direct sunlight or moisture
• With the lid tightly sealed to prevent oxidation

Following these conditions preserves compound integrity over time.

Further reading: HSE chemical storage guidance

5. How does Ostarine differ from RAD-140 or LGD-4033?

While all three are SARMs, Ostarine (MK-2866) is generally considered milder and better suited for research into muscle preservation, while RAD-140 and LGD-4033 are often studied for anabolic potency and strength adaptation.
Each compound interacts with the androgen receptor differently — meaning comparative results depend on study design and tissue selectivity.

Further information: Ostarine and it’s related research

6. Can Ostarine be used for human consumption?

No. Ostarine (MK-2866) is not approved for human use by the MHRA, FDA, or EMA.
All products sold by Max Muscle Labs are for laboratory research only and are not intended for dietary or medical use.

Read our guidance here.

7. Where can I verify testing data?

Visit our COA & HPLC Testing page. Enter the batch number printed on your bottle to view the full laboratory report, including HPLC chromatogram and purity results.

8. How often are COAs updated?

COAs and HPLC reports are updated for every new production batch.
Older results remain archived for transparency, so researchers can compare data across different lots for consistency.

9. What does the COA show?

• A COA (Certificate of Analysis) includes:
• Compound identity (e.g., Ostarine MK-2866)
• Batch number
• Purity percentage
• Testing method (HPLC / NMR / LC-MS)
• Independent lab signature and date

It’s the definitive verification that your sample matches its specification.