MK-2866

What is MK-2866 (Ostarine)

MK-2866, also known as Ostarine, is a selective androgen receptor modulator (SARM) developed to combat muscle wasting and osteoporosis. It is one of the most studied and widely used SARMs due to its well-tolerated profile and effectiveness in preserving and building lean muscle mass. MK-2866 binds selectively to androgen receptors in muscle and bone tissue, making it an ideal compound for athletes and bodybuilders during both bulking and cutting phases.

Benefits of MK-2866 (Ostarine)

• Promotes lean muscle growth and retention
• Enhances recovery and reduces muscle soreness
• Aids fat loss without muscle degradation
• Strengthens bones and improves joint health
• Excellent for beginners due to mild side effect profile  

How to Use MK-2866 (Ostarine)

Previous Research Dosages Used: Clinical trials and studies often use 10mg to 25mg per day over 8–12 weeks. Lower doses are typically used during cutting, while higher doses support bulking and muscle retention. MK-2866 is taken once daily due to its long half-life, and is frequently used as a base compound in research stacks.

Frequently Asked Questions

1. Is MK-2866 suppressive to natural testosterone?  
Yes, MK-2866 can cause mild suppression depending on the dose and duration. A short PCT is often used after a research cycle to support hormonal recovery.

2. Can MK-2866 be used for both cutting and bulking?  
Absolutely. MK-2866 is highly versatile—it helps retain muscle during cutting phases and supports lean muscle growth in bulking cycles.

3. When do users typically see results?  
Increases in strength, endurance, and muscle fullness are commonly reported within 2–3 weeks, with more significant changes visible by week 6–8.

4. Can MK-2866 be stacked with other SARMs?  
Yes, it’s frequently stacked with Ligandrol (LGD-4033), Cardarine, or RAD-140 depending on the specific goal—muscle gain, fat loss, or endurance.

5. Does MK-2866 require liver support supplements?  
While generally well-tolerated, some users choose to add liver support during longer cycles as a precaution. It is not methylated like many oral steroids.