Ostarine (MK-2866)
Muscle Preservation SARM
€55.00
What’s Included
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60 capsules per bottle -
10mg pure MK2866 per capsule
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2-month supply (1 cap daily)
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Third-party lab certificate included
Lab Tested
Third-party verified
Fast Shipping
3-7 business days
24/7 Support
Expert guidance
Product Description
Ostarine (MK-2866) is one of the most extensively researched selective androgen receptor modulators, attracting significant scientific interest for its interaction with muscle tissue and body composition. Its broad research profile has made it a well-known compound among both new and experienced researchers.
At CORE SARMS, we offer you premium-quality Ostarine, rigorously tested for purity and potency at third-party laboratories. Each capsule in this product contains 10 mg of 99%+ purity MK-2866.
Multi-Purpose SARM
One of the defining characteristics of Ostarine MK-2866 is its versatility. Unlike many SARMs that are primarily researched for a single purpose, MK-2866 has been investigated across a wide range of applications involving lean muscle, body composition, and recovery-related pathways.
40 reviews for Ostarine (MK-2866)
What are the Key Benefits of Ostarine (MK-2866)?
Muscle preservation
Lean gains
Enhanced recovery
Joint health support
Improved strength
Body recomposition
Ingredients & Dosage
Active Ingredients
Ostarine (MK2866)
10mgSelective androgen receptor modulator
Black Pepper Fruit Extract (Piper nigrum)
5mgEnhances absorption and bioavailability
Purity & Quality
Third-party lab tested 
99.7%+ purity guaranteed 
24-month shelf life Impact on Muscle Mass and Muscle Building
Ostarine (MK-2866) has been studied for its selective interaction with androgen receptors located primarily in muscle and bone tissue. Because of this tissue-selective activity, it has become a common subject of research into anabolic signaling and muscle maintenance.
Scientific investigations have explored MK-2866 for its potential role in protein metabolism and pathways associated with preserving lean muscle, particularly in studies involving calorie restriction or physically demanding conditions. Its relatively mild pharmacological profile has contributed to its popularity in long-term research settings.
Ostarine MK-2866 may provide sustained receptor activity, mainly due to its half-life of 24 hours.
Key Actions
How to Use Ostarine (MK-2866)?
Dosage
10mg once daily
Timing
Take with morning meal
Cycle Length
8-12 weeks followed by 4-week break
Important
Dietary supplement use only
Very well tolerated. Can be used for cutting or lean bulking phases.
Muscle Retention During Cutting Phases
One of the primary areas of research involving Ostarine MK-2866 is its potential role in supporting lean muscle during calorie restriction. Its tissue-selective activity has made it a frequent subject of studies examining muscle preservation under conditions associated with increased protein breakdown.
Evidence from clinical research has also contributed to this interest. In a Phase 2 study published in The Lancet Oncology, participants experiencing cancer-related muscle wasting demonstrated statistically significant improvements in lean body mass compared with the placebo group.[1]
Lean Muscle Research
In addition to muscle preservation, MK-2866 has been widely investigated in studies focused on lean muscle development. Rather than emphasizing rapid increases in size, research has explored its potential influence on gradual changes in body composition and anabolic signaling.
Users claim that its key advantages for this purpose include:
- – low water retention,
- – no aromatisation to oestrogen,
- – suitability for longer sessions due to the prolonged half-life.
At the same time, Ostarine users report slower gains than those achieved with RAD-140 or LGD-4033. However, according to them, these gains are more long-lasting.
Bone and Connective Tissue Research
Beyond skeletal muscle, Ostarine (MK-2866) has also been investigated for its interaction with bone and connective tissue. In a preclinical study using an ovariectomized rat model, researchers observed improvements in bone mineral density and bone strength at intermediate and higher dose levels.[2]
Because androgen receptors are present in both bone and connective tissue, these findings have encouraged additional research into the compound’s broader physiological effects. Temporary testosterone suppression has been reported in some studies involving extended protocols, although findings may vary depending on dose and duration.
Every batch of CORE SARMS Ostarine MK-2866 is independently tested to verify 99.7%+ purity and is supplied strictly for laboratory and research purposes.
Frequently Asked Questions
Ostarine (MK-2866) is a selective androgen receptor modulator (SARM) that has been extensively researched for its interaction with muscle and bone tissue. It is widely recognized for its tissue-selective mechanism and has attracted significant scientific interest in studies involving lean muscle maintenance, body composition, and anabolic signaling.
Ostarine MK-2866 is associated with milder potency (and side effects) than other SARMs, making it a popular option among athletes with less supplementation experience.
The most common results associated with Ostarine are: lean muscle gains, improved recovery, maintained strength during the cutting phase, and general body recomposition.
Yes, Ostarine may potentially cause mild fatigue, mood changes, and/or temporary hormonal shifts. The side effects are individual: some users report a few of them, while others may not experience any of the above.
Ostarine has a half-life of 24 hours. This is the time during which it remains active. The time to fully remove this compound from your body will be significantly longer. Remember that the exact times depend on numerous variables, like the dosage or your general metabolism.
Ostarine is not a steroid. Like steroids, it affects androgen receptors, mimicking the effect of steroids. However, as it is a SARM, it does so mainly for the bone and muscle tissue, avoiding other organs.
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Complete muscle building stack: Ligandrol, Testolone, Ostarine, Ibutamoren
Sources:
[1] Dobs, A. S., Boccia, R. V., Croot, C. C., et al. (2013). Effects of enobosarm on muscle wasting and physical function in patients with cancer: a double-blind, randomised controlled phase 2 trial. The Lancet Oncology, 14(4), 335-345. https://doi.org/10.1016/S1470-2045(13)70055-X
[2] Hoffmann, D. B., Komrakova, M., Pflug, S., et al. (2019). Evaluation of ostarine as a selective androgen receptor modulator in a rat model of postmenopausal osteoporosis. Journal of Bone and Mineral Metabolism, 37(2), 243-255. https://doi.org/10.1007/s00774-018-0929-9
Customer Reviews
Reliable and consistent on a cut
The best thing for beginners
I felt that my joints felt a lot better
Write a Review
admin-core-sarms-wp –
Solid product with consistent results. Customer service was helpful when I had questions.
Martin Fischer –
As a total noob, I love it (beginner friendly)
Piotr Nowak –
Works wonders
Jan Kowalczyk –
Decent price and good service.
Adam Dąbrowski –
Lol
Pavel Ivanov –
Must have!
Sergei Volkov –
Interesting compound
Andrei Popescu –
Fast delivery and discreet package. I will test the product tomorrow.
Mihai Ionescu –
Strength spikes are real, but still love it!
Bogdan Stanescu –
Also works.
Alexander Petrov –
Hits faster than you think (trust me lol)
Radu Dumitrescu –
10/10
Marek Zielinski –
When I went on a cut not only did I lose fat but I also kept the gains and against all odds, saved all my muscle.
Ion Marinescu –
This will be my fifth cycle with it.. I think it really works – idfk
Mark Lewis –
MK-2866 at 10mg was my first cycle ever. I dont know about other compounds i feel like there is no better compound than this one. At this dose it was amazing no sides at ALL, good recovery and consistent strength. For someone who doesn’t trust all other compounds because of suppression and sides – this is the one. Various dosages its very versatile, higher dose with no sides or lower dose doesnt matter – MK2866 does it all.
Adam Abraham –
Favourite one yet
Donovan Onyx –
Best thing I have ever tried
Kellen Justice –
I really like this, just because its on the milder side
Vinal Randall –
15mg is the sweet spot. Only ups and no downs
Brad Pete –
Its really easy to use
Leighton Luke –
This is really smooth
Rylan Geffrey –
This didn’t disappoint at all
Xavier Audley –
This is really easy to use
Jrue Jett –
My trust is earned
Munro Lanford –
Good
Joziah Jae –
Perfect for beginners
Callahan Galen –
MK-2866 at 10mg was my first cicle ever. I dont know about other compounds i feel like there is not a better compound that this one. At this dose it was amazing no sides at ALL, good recovery and consistent strength. For someone who doesnt trust all other compounds because of suppresion and sides – this is the one. Various dosages its very versatle, higher dose with no sides or lower dose doesnt matter – MK2866 does it all.
Jarred Moon –
I took 20mg, and the results were just incredable
Brett Morton –
My favourite SARM, no doubt
Ollie Combs –
Took 10mg for 8 weeks and as a first timer cant really say nothing bad, just solid progress
Laurence Middleton –
When taking it the next time, im defiantly going to up my dose. Had a good run with it, but wanned something a bit more
Billy Armitage –
Didnt really notice that much benefits, but the recovery factor squeezed out the 5 star rating
Robbie Lambert –
Took it for my Broken arm. My dr. said that im healing pretty fast, so I guess it worked
Rex James –
Feels like I have infinite energy
Ron Metcalf –
Just reordered it
Benjamin Ballard –
No point in trying anything else, this is the best one
Sebastian Parry –
I like it because its mild and suppression is not a problem with it
Dean Harding –
I felt that my joints felt a lot better
Grahame Stokes –
The best thing for beginners
Andrew Draper –
Reliable and consistent on a cut