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MK-2866 (Ostarine), 15 mg

4.75 out of 5
(546 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.


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

  1. 5 out of 5

    Anonymous (verified owner)


  2. 5 out of 5

    Jorge (verified owner)


  3. 5 out of 5

    Jorge (verified owner)


  4. 5 out of 5

    Anonymous (verified owner)

    On a 12 week cycle my research subject gained 8 pounds of lean muscle and was on a somewhat caloric deficit

  5. 5 out of 5

    Anonymous (verified owner)


  6. 5 out of 5

    Anonymous (verified owner)

    Works amazing lost 40 pounds in 2 -3 months

  7. 5 out of 5

    Dominic Conderato (verified owner)


  8. 5 out of 5

    Randy S. (verified owner)

    Research study has experienced a 9 poind gain along with a 3pont body fat reduction over a two month period.

  9. 5 out of 5

    VIPER (verified owner)

    This is legit Ostarine. The 3 pack was a great deal and made this overall twice as good a value as my previous suppler. I’ve use half of one bottle so far – a solid performer.

  10. 5 out of 5

    Anonymous (verified owner)

    The subject definitely saw muscle and strength gains.

  11. 5 out of 5

    Anonymous (verified owner)

    Love to stack this with the yk11.

  12. 4 out of 5

    Tracy Harrison (verified owner)

    Very good product, subject had atrophy on left side due to stroke 20 years ago, mk2866 improved general muscle function as well as diaphragm, heart and lung function on paralyzed side. Side effect is constipation, unfortunate but endurable.

  13. 5 out of 5

    David Hefez (verified owner)

    Fantastic product. My lab subject gained muscle at a very fast rate in only 3 weeks. Highly recommend

  14. 5 out of 5

    Adam H. (verified owner)

    Really works for me (my research). Take before workout, removes soreness the next day and ready to workout even harder the next day. Would absolutely buy this product again, highly recommend to anyone trying to lean and build muscle.

  15. 5 out of 5

    Don E. (verified owner)


  16. 5 out of 5

    Lyon (verified owner)


  17. 5 out of 5

    Anonymous (verified owner)


  18. 5 out of 5

    Allen Trimmings (verified owner)

    Simply amazing!!! Everyone body react differently! My skin became sensitive and I got a rash on my chest and neck!! But nothing serious! Overall took my body to a different level!!!

  19. 5 out of 5

    Eric (verified owner)

    I feel like it helped my research subject after surgery.

  20. 5 out of 5

    Carter T (verified owner)

    Good joint support and injury recovery. Stacked with YK11 and unlocked some good next-level gains in subject.

  21. 4 out of 5

    Anonymous (verified owner)

    Research is on-going but with Covid-19 data is inconclusive.

  22. 5 out of 5

    Ethan Minor (verified owner)

    Excellent between-cycle maintenance. ST ostarine never disappoints.

  23. 5 out of 5

    Drew Dunn (verified owner)


  24. 5 out of 5

    Peter Nyren (verified owner)

    The bedrock of my subject’s sarm stack, faithful strength and mass gains with reduced post workout soreness.

  25. 2 out of 5

    Denise Roach (verified owner)

    Not much results from testing…

  26. 5 out of 5

    Anonymous (verified owner)

    Research subject took 15 mg daily and experienced increased strength gains and increased endurance around the 4 week mark. There was a definite decrease in body fat (even without a strict diet) as well as an increase in solid, defined muscle. Subject experienced no noticeable side effects and as a result has decided to run the experiment for 12 weeks rather than the 8 originally intended.

  27. 5 out of 5

    Anonymous (verified owner)

    Research subject experienced more energy and endurance

  28. 5 out of 5

    Mike (verified owner)


  29. 5 out of 5

    Joshua K. (verified owner)

    Good lean hard gains. First time researching and have zero complains!

  30. 5 out of 5

    Sammy M. (verified owner)

    Research Subject experienced some muscle endurance during workouts, resulting in more Reps and Sets. Prior joint pain was reduced also. There was a loss of abdominal and oblique fat too.

  31. 5 out of 5

    Joseph L. (verified owner)

    Great product joints feel 90% better!

  32. 5 out of 5

    Nicolas Escobedo (verified owner)


  33. 5 out of 5

    Kevin R. (verified owner)

    Good stuff!

  34. 4 out of 5

    Anonymous (verified owner)


  35. 3 out of 5

    Joshua (verified owner)

    Really to soon to tell.

  36. 5 out of 5

    Sammy M. (verified owner)

    Research subject has lost some stubborn body fat around the midsection.

  37. 5 out of 5

    Greg C. (verified owner)

    Great product

  38. 5 out of 5

    Kevin Richey (verified owner)

    Great product! I’ve noticed my subject has been putting on muscle more quickly than usual.

  39. 5 out of 5

    Jack (verified owner)

    Great product. Excellent Customer Service. Fast Delivery.

  40. 5 out of 5

    Matt (verified owner)


  41. 5 out of 5

    Benjamin K. (verified owner)

    Great when paired with other sarms. Alone couldn’t really see much results. Would definitely use again, no pCT required for this one

  42. 4 out of 5

    Robert Barreth (verified owner)

    Seems to work well.

  43. 5 out of 5

    Kevin E. (verified owner)


  44. 5 out of 5

    john andrews (verified owner)

    The service was surprisingly fast and making great progress at 7 weeks in

  45. 5 out of 5

    Dave collins (verified owner)

    It works great for me. Definite strength and muscle gains for a man in his mid 40s.

  46. 4 out of 5

    Anonymous (verified owner)


  47. 5 out of 5

    Natasha (verified owner)


  48. 5 out of 5

    Matt (verified owner)


  49. 5 out of 5

    Mike L. (verified owner)

    AMAZING product! No side effect, and unreal results

  50. 5 out of 5

    Dave collins (verified owner)

    Definitely works. Was able to see gains in strength and muscle while losing fat.

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