MK-2866, also known as Ostarine or Enobosarm, is a selective androgen receptor modulator (SARM) supplied here in 25 mg oral tablets by Dragon Pharma. It has garnered attention for its potential in preserving lean muscle mass, enhancing strength, and supporting bone mineral density—especially in scenarios involving muscle wasting or recovery from catabolic states. It offers a tissue-selective anabolic effect without the typical androgenic side effects of steroids.
Mechanism of Action
Ostarine (MK-2866) binds selectively to androgen receptors in skeletal muscle and bone tissue, promoting protein synthesis and anabolic activity while sparing reproductive tissues. Unlike testosterone or anabolic steroids, MK-2866 does not convert to estrogen or DHT, making it a target of interest for muscle preservation in aging populations, injury recovery, and muscle-wasting disease models.
This oral SARM demonstrates a dose-dependent increase in lean body mass and muscle function in research trials, with a favorable pharmacokinetic profile and minimal off-target androgenic effects. It is also being explored for post-surgical rehabilitation, osteoporosis, and chronic disease cachexia management.
Key Features & Benefits
- Tissue-Selective Anabolic Support: Promotes muscle and bone growth without significant impact on prostate or reproductive tissues.
- Lean Mass Preservation: Studied for preventing muscle loss in calorie-deficit or aging models.
- Oral Bioavailability: Taken as tablets with high absorption and no need for injections.
- Non-Steroidal Structure: Avoids estrogen conversion or liver toxicity typical of anabolic steroids.
- Backed by Clinical Trials: Extensively researched in both healthy individuals and medical populations for strength and lean mass outcomes.
Legal Disclaimer
Disclaimer: MK-2866 (Ostarine) is intended solely for scientific and laboratory research. It is not approved for human consumption or therapeutic applications. Proper handling and compliance with local regulations is required.
Frequently Asked Questions
Research shows Ostarine may suppress natural testosterone production depending on dose and cycle length. This is reversible post-cycle in most models.
Unlike some oral steroids, Ostarine is not 17-alpha alkylated and shows low hepatotoxicity in studies, though liver markers should be monitored during use.
Enobosarm has been researched for muscle preservation in cancer cachexia, aging-related muscle loss, osteoporosis, and rehabilitation after surgery or injury.
Yes, Enobosarm is the chemical name for MK-2866, more commonly known as Ostarine in research and bodybuilding circles.
Yes, some suppression of endogenous testosterone can occur with MK-2866 depending on dosage and duration of exposure in studies.
