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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

    Anthony (verified owner)

    Subject taking a stack of ligandrol/ ostarine/ ibutamoren, 1 cap of each, everyday, 30mins before wrkout while in a fasted state. Research only on for 10 days now but see definite growth and subject feels great. Would recommend this stack for peak performance.

  2. 5 out of 5

    Michael (verified owner)

    Increased strength for a great price.

  3. 5 out of 5

    Chavdar (verified owner)

    Subject started to take Ostaine few weeks ago but has already felt strength and stamina increase substantially. Combined with Andarine and Cardarine. Will continue research with them few more weeks to see if fat content goes down.

  4. 5 out of 5

    Anonymous (verified owner)


  5. 5 out of 5

    Fabiano Purper (verified owner)


  6. 5 out of 5

    Oscar L. (verified owner)

    Definitely would buy again! Great product

  7. 5 out of 5

    Justin (verified owner)


  8. 5 out of 5

    kenneth kainz (verified owner)

    Been buying from Sarmtec and it’s the Best Buy for your money and the quantity that you receive.

  9. 5 out of 5

    Benjamin Duncan (verified owner)

    Excellent product and fast shipping!

  10. 5 out of 5

    Richard Hernandez (verified owner)


  11. 5 out of 5

    Kristopher Morrow (verified owner)

    Great product I can tell its working STRONG

  12. 5 out of 5

    Alexander A. (verified owner)

    Arrived very quickly. Subject felt the benefits regarding tendon healing within a few days. All lifts increased notably within the first 2 weeks. Will order again!

  13. 5 out of 5

    Ryan M. (verified owner)


  14. 5 out of 5

    Mike C. (verified owner)

    Some of the best products I’ve ever used

  15. 3 out of 5

    Kieran F. (verified owner)

    Ordered by mistake, researched with it anyway, subject grew in any case

  16. 4 out of 5

    Russell H. (verified owner)


  17. 5 out of 5

    Patrick (verified owner)

    High quality. Could measure a difference only after 5 days. Strength and lean mass both increased. All 3 major lifts had a 3% measurable increase. BF is down 1% over a 4 week span. Nutrition and sleep have been consistent. Worth the investment.

  18. 5 out of 5

    Ronald Orange (verified owner)


  19. 5 out of 5

    Adam (verified owner)

    Subject’s strength and gains coming along nicely. Had to go up in size in tshirts.

  20. 5 out of 5

    Ronald Orange (verified owner)

    Great product, subject has put on 8-10 lbs, muscles are rock hard, veins are popping all around, solid product

  21. 5 out of 5

    Erick A (verified owner)

    Harder muscles and strenght went up.

  22. 5 out of 5

    Anonymous (verified owner)


  23. 5 out of 5

    Timothy (verified owner)

    Awesome deal, one of my favorites. Good dosage a lot of pills. Trusted source. Thank You!

  24. 5 out of 5

    Anonymous (verified owner)


  25. 5 out of 5

    Joseph (verified owner)


  26. 5 out of 5

    Jonathan Hamby (verified owner)

    I’m loving this product

  27. 4 out of 5

    Kristopher Morrow (verified owner)

    Great gains cant go wrong

  28. 4 out of 5

    Hayden H. (verified owner)

    Works well stacked with LGD

  29. 5 out of 5

    Walter (verified owner)

    Lower 15 mg is great for tendon and ligament healing, when using it for 3 month cycle.

  30. 5 out of 5

    David D. (verified owner)

    Great product! Great results as advertised! By far the best customer service on the web!

  31. 5 out of 5

    Marshall (verified owner)


  32. 5 out of 5

    Anonymous (verified owner)

    Great product really sheds weight

  33. 5 out of 5

    Daniel Guardiola (verified owner)


  34. 5 out of 5

    Mike C. (verified owner)

    In 1 month size and strength increased like no other!

  35. 4 out of 5

    Anonymous (verified owner)

    Stacking with RAD-140, subject dropped 9.5 lbs. in 2 weeks

  36. 5 out of 5

    Brian W. (verified owner)

    Fast awesome shipping, Great gains, Great price. Stacked rad140 (15mg), mk677 (15mg), LGD4033 (10mg) and MK2866 (15mg) and very pleased with experiment results so far! Only 2 weeks in and subject is breaking major records. Will start S4 in week 5 @ (25mg twice daily) and up rad140 dose to (30mg). Will definitely do a PCT along with GW501516.

  37. 4 out of 5

    Zachary H. (verified owner)

    I am only leaving a 4 at this time because I am just finishing week two of my subject’s research cycle. So far so good. Stacking this and MK-2866, both at 15mg or 1 pill each. I can definitely notice a difference in subject’s muscle endurance and some strength. I look forward to seeing where this goes. Looking to up the dosage in week 3 to 30mg or two tabs each.

  38. 5 out of 5

    Anonymous (verified owner)


  39. 5 out of 5

    Anonymous (verified owner)

    Stacking with Rd-140 next week

  40. 5 out of 5

    Jonathan (verified owner)

    Soreness is non-existent because subject’s recovery time is tremendous using this product. Perfect stacker for LGD.

  41. 5 out of 5

    Anonymous (verified owner)

    Definitely worked great on my test subject! Fast Shipping!

  42. 5 out of 5

    Mjjc5291 (verified owner)

    5/5!!! Sarmtech.net is legit guys. Lab rats and test subject really did see increase in lean muscle mass and healing abilities from this product. All subjects were given 15-30mg throughout an 8 week period of time. Mild suppression recommend pct after cycle. Pure quality product. Great prices too!

  43. 4 out of 5

    Andrew P. (verified owner)

    Subject has only been on it a week so i cant say to much yet

  44. 5 out of 5

    Aaron (verified owner)

    This is good Ostarine. Stacking with LGD-4033 from last cycle and previous source (now out of biz). Now starting 5th week of this 2-sarm, 8-week cycle study. Results half-way through study: 3% reduction in BM (as per CN bodycomp)! 6 lb lean muscle increase, and subject is also down 2 lb overall from fat loss.

  45. 5 out of 5

    Caleb R (verified owner)

    Ordered for female test subject who has experimented before with ostarine for cutting and weight loss – her results have been outstanding – she’s a machine! It was packaged discreetly. Fast shipping.

  46. 5 out of 5

    Jake (verified owner)

    Not as powerful as I thought but I think I meant to get rad or lgd. Sarmtech gave me a discount for next purch. I will keep research study going with both and stack since the osta works on bone strength and may help heal an injury the subject has had a long time.

  47. 5 out of 5

    frozenone (verified owner)

    This is most definitely the best value in SARMs out there, esp for Ligandrol and Ostarine and Ibutamoren. In my research I stack all 3, one of each per day, so 90 day stack for 3 month stack for about $100!??! Unheard of in sarm world!

  48. 5 out of 5

    Roberto (verified owner)

    Subject’s first Ostarine cycle. Halfway through the bottle and looking and feeling great, good energy boost too. Planning on 2 month cycle.

  49. 5 out of 5

    Rob D (verified owner)

    strong gains plus helping subject’s torn rotator cuff (a LOT less shoulder pain compared to 3 weeks ago)
    – stacking with mk 677 gh

  50. 5 out of 5

    samir m (verified owner)

    Certainly most powerful ostarine i’ve researched with yet- subject’s muscles tight and experiences erections most mornings.

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MK-2866 (Ostarine), 15 mg