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MK-2866 (Ostarine), 15 mg

4.75 out of 5
(555 customer reviews)




MK-2866 (Ostarine) Research Profile:


Description: 1st gen SARM, very common, very versatile. Moderate, consistent effects on muscle and strength gains; cited as "injury prevention or recovery" SARM due to focused AR binding to bone and surrounding tissues.

Known for: Injury recovery, mild anabolic, versatility.

Commonly stacked with: Synergistic effects with other SARMs or stack

Side-effects: Very few reports of adverse side-effects


MK-2866 (Ostarine) Chemical Profile:

Clinical data

Selective Androgen Receptor Modulator
Enobosarm, Ostarine, GTx-024, MK-2866, S-22
By mouth
US: Investigational New Drug
GTx, Merck & Co.

Pharmacokinetic data

24 hours


((2S)-3-(4-cyanophenoxy)-N- [4-cyano-3-(trifluoromethyl)phenyl] -2-hydroxy-2-methylpropanamide)

Chemical and physical data

389.33 g/mol
132 to 136 °C (270 to 277 °F)
O=C(NC1=CC=C(C#N)C(C(F)(F)F)=C1) [C@](C)(O)COC2=CC=C(C#N)C=C2
1S/C19H14F3N3O3/ c1-18(27,11-28-15-6-2-12(9-23) 3-7-15)17(26)25-14-5-4-13(10-24) 16(8-14)19(20,21)22/h2-8, 27H,11H2,1H3,(H,25,26)/t18-/m0/s1


* These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Selective Androgen Receptor Modulators (SARMs) have not been approved in the US by the FDA for human consumption as dietary supplements. In accordance with US laws pertaining to the use of Investigational New Drugs (IND's) products labeled as SARMs on this website are sold for laboratory and clinical research purposes only, are intended solely for investigational use, and are to be used exclusively for purposes of a clinical trial that is the subject of an effective investigational new drug application; otherwise, you are not authorized to purchase our products. By using this site and/or purchasing our products, you certify you and/or your organization is/are qualified to possess, handle, and administer the products you purchase, that SARMTECH and its owners/agents are not liable for any unintended effects or outcomes, and that you are 21 years of age or older.


555 reviews for MK-2866 (Ostarine), 15 mg

  1. 5 out of 5

    Justin Koth (verified owner)

    My female test subject GREAtLY appreciates the easy to take capsules. Will be customer for as long as they sell this 🙂

  2. 5 out of 5

    Trevor Ricci (verified owner)

    Great product! Real 1000% , SARMTECH is definitely my go-to for the highest quality.

  3. 5 out of 5

    John Kanne (verified owner)

    MK-2866 Results are almost immediate. And fantastic. Joint pain reduced by 80%. Getting stronger everyday.

  4. 5 out of 5

    Esmaeel Hxhsjjx

    Awesome and good price

  5. 5 out of 5

    Michael Brandon

    Amazing product and you start to see results super quick

  6. 5 out of 5

    Antonio Sánchez (verified owner)

    Think that this product very much helped in my development. Had done 1 cycle believe it is well worth it! Do recomend for older “serious” lifters

  7. 5 out of 5

    Matthew Fauerbach

    Strength + size

  8. 5 out of 5

    Anthony Jackson (verified owner)

    This was a great intro for research subject to start with. Subject experienced noticable body recomposition and slight increase in lean body mass that would not be achieved in as much time without it.

  9. 5 out of 5

    Hussain Alghazali (verified owner)

    noticle gains and didnt need to pct with this

  10. 4 out of 5

    Brandon Burke (verified owner)

    Test subject felt very confident, felt out of breath and tired during some workouts. Still recovering from a 6 week cycle, subject feels very lethargic. Decent gains tho.

  11. 5 out of 5

    Devin Hodge (verified owner)

    Great service and the product maintained muscle in my subject during cut.

  12. 5 out of 5

    Ted Tuleck

    Subject had noticeable strength gains in week 2. No side effects. Fast shipping, great customer support.

  13. 5 out of 5

    SHAWN GLASGOW (verified owner)

    Helps with sore joints. Sarmtech customer service is always top notch.

  14. 5 out of 5

    Joshua Plummer (verified owner)

    Great product [subject] gained strength in all lifts and able to stay lean and put on muscle mass very happy

  15. 5 out of 5

    Logan Broussard (verified owner)

    Highly recommended, subject noticed results in strength as well as joint pain close to disappeared as soon as 2 weeks of using , big results at the 6th-8th week mark & at 12 weeks sustained feeling as well an improved visual of the physical body. Note: Subject had a diet plan while using supplement.

  16. 4 out of 5

    Anton Quiros (verified owner)

    Currently week 4 of trial. [Research subject] has notable growth of muscles and better physique. I have noticed hair thinning/loss since week 3. Hopefully it fixes once the test is finished.

  17. 5 out of 5

    Kyle B (verified owner)

    Exactly as advertised

  18. 5 out of 5

    Derrick Truett

    Knees feel 100% better

  19. 5 out of 5

    Tyree Travis (verified owner)

    After 2 weeks I started to see the results and was amazed!

  20. 5 out of 5

    Brutus Blackheart (verified owner)

    MK-2866 delivers as advertised. Joint, connective tissue and muscle health improvements are substantially improved. The lean body mass and strength increases are great, but feeling 15 years younger… priceless!

  21. 5 out of 5

    James Emery (verified owner)

    Superb Product at a Great price. Will decently return for more in the future. Fast shipping as well.

  22. 5 out of 5

    Zachary Abell (verified owner)

    This product is amazing. Test subject had a ligament issue in his knee and nothing seemed to help it until this. At this point knee is about 70% better and still improving. This compound begins working quickly but it is not till the end of the 4th week that you notice how much it is really working. It just gets better and better. Test subject takes 15mg at the same time everyday. Would recommend a minimum 8 week cycle to get best results.

  23. 5 out of 5

    David Modlin (verified owner)

    More size, strength, and better body composition. [Subject] also felt good during the cycle with no crashing libido or test levels.

  24. 5 out of 5

    Alex Hernandez (verified owner)

    I’ll keep it short. this was my [subject’s] 1st cylce. of a sarm took 15mg for first week. didn’t notice anything untill my [subject] started on his 2nd week with 30mg every morning. my [subject] increased his endurance, strength, stamina, very active, gains are noticeable on around 2-3rd week. i am proud of my [subject] very optimistic to do another cycle.

  25. 5 out of 5

    Landon Alexander (verified owner)

    This does just what you would expect out of a middle-of-the-road compound. It’s great if you’re just beginning research or are worried about side effects. [Subject, male] was about 6cm and 225-230g. Weight is currently between 230-235g, but BF% has decreased slightly. Visually the [Subject] looks more rounded and balanced in muscle tone and size, particularly around the chest, shoulders and upper back. [Subject] exhibited some signs of lethargy, but nothing that kept him from normal activities. [Subject] is predisposed to hair loss, but while staying on their usual regimen to treat hair loss, no hair loss was noted. Some testicular retraction, but sex drive and abilities all stayed intact. MK-2866 (Ostarine) was administered over 8 weeks with GW-501516 (Cardarine) over 7 weeks.

  26. 5 out of 5

    Brian Harasha (verified owner)

    This stuff works. [Subject] gained about 10lbs of muscle on my cycle.

  27. 4 out of 5

    Maurice Ivy (verified owner)

    Subject noticed immediate results in performance; especially lifting power. Subject didn’t feel any improvement with tendon injury though. The raw power in lifting made up for it.

  28. 5 out of 5

    DAN RIFFEY (verified owner)

    Subject is on 3rd day of stacking MK-2866 with LGD-4. Subject did not take long to feel the effects! Already improving in strength, endurance, and drive. Real deal products, fast shipping 3 days!! Thanks again Sarmtech!

  29. 5 out of 5

    Samuel Ambler (verified owner)

    Good product. Subject showed strength and size gains a few weeks in with hard training. Great to stack with others for bulk.

  30. 5 out of 5

    Desmond Singh (verified owner)

    This is an amazing muscle preserver fellas, This company is legit.

  31. 5 out of 5

    Dave collins (verified owner)

    A solid product for your [test subjects]. They like this best by itself especially for the older ones.

  32. 5 out of 5

    Jesse Miramontes (verified owner)

    Works the way its supposed to. Its a legit product.

  33. 5 out of 5

    Jake (verified owner)

    Excellent joint and tendon recovery

  34. 4 out of 5

    Cory Sadler (verified owner)

    Helped strengthen my [subjject’s] legs a lot

  35. 5 out of 5

    ReadBronzeAgeMindset (verified owner)

    40yo male subject reports noticeable gains in strength and fizeek, moderate reduction in body fat, less joint pain, and increase in focus, discipline and intensity. Subject has gladly volunteered for phase II trials.

  36. 5 out of 5

    Bryce Bowman (verified owner)

    After just 4 weeks of consistent weight training of an experienced, trained individual yielded a decrease in body fat by 2%, 3lbs respectively, and an increase in LBM by 6%, 10.5 lbs respectively. Subject experienced increased recovery, muscle tone and significant strength increase. Dosage of 45 mg/day. No stack.
    Note: Test subject has above average ability to grow muscle. 18 years of weight training. Average lean body mass growth of 3-5 lbs annually as a natural bodybuilder.

  37. 2 out of 5

    Jesse McGill (verified owner)

    The test subject is taking this plus Cardarine at the same time, both ordered from here. They are taking 1 pill each daily and have been taking it for the last 8 weeks. Their diet is very consistent, They are eating enough protein, and exercising daily and they have not seen any gains or loss in body fat. Energy levels are low, ED has showed up, libido is low. Today is the last day they will be taking either for a single month. Will be ordering PCT hoping to rebound. They will not be going through another round.

  38. 5 out of 5

    Joey E (verified owner)

    Best all around SARM for improving athleticism, strength, joints & maintain a good weight. Not too much bulking, more for cutting.

  39. 5 out of 5

    Kenneth Swope (verified owner)

    just want to say Sarmtech is legit and ships fast. Ran a 8 week cycle of ostraine. 1 pill per day. I [started subject on] this mostly because of many naging injuries that prevented from going hard in the gym. After 2 weeks all pain even shoulder pain was gone. Recovery was off the charts. [Subject] could lift everyday and not be sore. All lifts went up. did not get huge or ripped, just steady gains. I noticed some slight suppression around week 4. Off cycle for 2 weeks now and shoulder pain has not returned!!!

  40. 5 out of 5

    Garrett Hayes (verified owner)

    Great product, great customer service, fast shipping.

  41. 5 out of 5

    Mike Pere (verified owner)

    Really like the product, brand and company. Would highly recommend!

  42. 5 out of 5

    Lachlan Graham (verified owner)

    Does as it says, reliable and consistent

  43. 5 out of 5

    Karson Pharris (verified owner)

    Subject has had great success with this product. Lots of strength gainz.

  44. 5 out of 5

    Jack Pharris (verified owner)

    Product worked very well in my opinion. Had some shoulder pain for about 3 years now and it completely went away in two weeks.

  45. 5 out of 5

    Maxime Julien (verified owner)

    Must have in your stack!

  46. 5 out of 5

    Maxime Julien (verified owner)

    Great overall product. I had great result with the cutting stack and this was in it. Recommended

  47. 5 out of 5

    Maxwell Tafolla (verified owner)

    Came as advertised, safe, discreet, and secure. Just started my cycle. Hopefully all stays good!

  48. 5 out of 5

    Geraint Roberts (verified owner)

    Amazing product, clearly legit sarm as results observed very quickly, will definitely order again!

  49. 5 out of 5

    Asvp190 (verified owner)

    Increased endurance and helped with intense training and size

  50. 5 out of 5

    Mrownz (verified owner)

    This is their best product!!!

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MK-2866 (Ostarine), 15 mg