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MK-677 (Ibutamoren), 15 mg

4.76 out of 5
(595 customer reviews)




MK-677 (Ibutamoren) Research Profile:

dependent on stack
dependent on stack
7/10 (cutting stack)
dependent on stack

Description: Growth Hormone (GH) mimetic/secretegogue; effects include improved lean muscle generation, improved metabolism and fat oxidization; some subjects also exhibit healthier skin and sleep improvement.

Known for: Mimicking effects of Growth Hormone

Commonly stacked with: Typical bulking stack: MK-677, YK-11 and RAD-140/or/LGD-4/or/S-4/or/S-23 | optional: MK-2866,
Typical cutting stack: MK-677 and GW-501516/or/SR-9009 | optional: MK-2866

Side-effects: Some complain of lethargy, increased appetite, tingly or numb hands/fingers


MK-677 (Ibutamoren) Chemical Profile:

Clinical data

Selective Androgen Receptor Modulator MK-677, MK-0677, Ibutamoren, L-163,191, Nutrobal, Oratrope By mouth none US: Investigational New Drug Ammonett Pharma

Pharmacokinetic data

24 hours


2-amino-2-methyl-N-[1-(1-methylsulfonylspiro [2H-indole-3,4'-piperidine]-1'-yl)-1-oxo-3 -phenylmethoxypropan-2-yl]propanamide 159634-47-6 9939050 n/a 154975 GJ0EGN38UL n/a 100.236.734

Chemical and physical data

C27H36N4O5S 528.662 g/mol n/a O=S(C)(=O)N(C2)c1ccccc1C23CCN(CC3) C(=O)C(NC(=O)C(N)(C)C)COCc4ccccc4 1S/C27H36N4O5S/c1-26(2,28)25(33)29-22 (18-36-17-20-9-5-4-6-10-20)24(32)30-15-13-27 (14-16-30)19-31(37(3,34)35)23-12-8-7-11-21(23)27/ h4-12,22H,13-19,28H2,1-3H3,(H,29,33)/t22-/m1/s1 UMUPQWIGCOZEOY-JOCHJYFZSA-N


* 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.


595 reviews for MK-677 (Ibutamoren), 15 mg

  1. Avatar
    5 out of 5

    Reynaldo Tirado (verified owner)

    You can see results in a couple of weeks.

  2. Avatar
    5 out of 5

    Ira Bergman (verified owner)

    best product

  3. Avatar
    2 out of 5

    Matthew Stamm (verified owner)


  4. Avatar
    5 out of 5

    ROGER C. (verified owner)

    Like this product a lot, SARM version of GH. Good for getting lean.

  5. Avatar
    5 out of 5

    Ben F. (verified owner)

    sleep has improved, I recommend splitting the dosage to avoid lethargy and appetite increase. Have noticed a little water retention

  6. Avatar
    5 out of 5

    Anonymous (verified owner)


  7. Avatar
    5 out of 5

    Justin Schmedthorst (verified owner)


  8. Avatar
    4 out of 5

    Donald Salazar (verified owner)


  9. Avatar
    5 out of 5

    Anonymous (verified owner)

    Great quality and way better than liquids.

  10. Avatar
    5 out of 5

    Jeramiah (verified owner)


  11. Avatar
    5 out of 5

    Sean (verified owner)


  12. Avatar
    5 out of 5

    Anonymous (verified owner)

    Highly recomend. Back for more

  13. Avatar
    5 out of 5

    Austin Butler (verified owner)

    Been stacking for my research with 2866. Love this product as well

  14. Avatar
    5 out of 5

    Mark (verified owner)

    The real deal. Great stack with mk2 and lgd!

  15. Avatar
    5 out of 5

    Dgoodsell (verified owner)

    My go to all year round. Love this

  16. Avatar
    5 out of 5

    Tommy Chay (verified owner)

    Worked instantly!! Hunger was through the roof, recovery and sleep was amazing!

  17. Avatar
    5 out of 5

    GAB YONG KIM (verified owner)

    It’s really the best.

  18. Avatar
    5 out of 5

    Marcus Waugh (verified owner)

    Genuine product. Definitely helped with slow recovery times. Subject stacked with RAD140 …… very pleased with his results!

  19. Avatar
    5 out of 5

    jayvazq (verified owner)

    Fantastic product will continue to buy

  20. Avatar
    5 out of 5

    Andrew Kay (verified owner)

    Assisted with sleep, increased appetite and lends to an overall greater sense of well-being and recovery in research subject.

  21. Avatar
    5 out of 5

    Lorne Abbett (verified owner)

    Excellent quality product. Follows the directions and your lab subject will see excellent gains. My subject gained 15.8 lbs of lean muscle on a strict 5 day workout and diet.

  22. Avatar
    5 out of 5

    woodd (verified owner)

    Excellent product. Noticed a significant increase in muscle mass and decrease in body fat. Improved recovery and even noticed an improvement in my skin. 10/10 would recommend.

  23. Avatar
    5 out of 5

    Anthony (verified owner)

    Works immediately

  24. Sergio Arevalo
    4 out of 5

    Sergio Arevalo (verified owner)

    This stuff is strong, I bought it with the intentions to bulk up my subject but wasn’t eating enough so we hopped off. I suggested to take it before bed to stop the hunger.

  25. Avatar
    5 out of 5

    Srisri Gokanapudy (verified owner)

    Subject used to β€œregain lost muscle and lose gained fat” from a 6 month break due to surgery. Took 2 months gained 12 pounds lean muscle and lost 5% body fat (stats are also skewed by the fact that body automatically recomps faster after a break). Definitely buying again soon.

  26. Avatar
    5 out of 5

    Alexandre Steben

    Strong product however my lab subject was much hungrier then normal. It is proof that it is working but might not be best for those on a diet.

  27. Avatar
    5 out of 5

    JT Croft (verified owner)

    Good to find MK-677 available in easy to take capsules

  28. Avatar
    5 out of 5

    Craig Yost (verified owner)

    Phenomenal product and high quality service! I will definitely be a repeat buyer!

  29. Avatar
    5 out of 5

    Christine Esparza (verified owner)

    Started using this months ago, my research subject feels great.

  30. Avatar
    5 out of 5

    Fred Baier (verified owner)

    Awesome product, definitely can tell it works. Add size and leaner at same time.

  31. Avatar
    5 out of 5

    Harry Bond (verified owner)

    Stacked this with LGD. Saw really good results, research subject lifted more weight than he ever has. Much better muscle definition. No noticeable side effects from the stack.

  32. Avatar
    5 out of 5

    Jonny Klause (verified owner)

    Great for your lab rat to make gains. I noticed my lab subject got very hungry and gained a lot of water weight. The only downside is my lab subject was lethargic throughout his cycle

  33. Avatar
    5 out of 5

    Chanse loudenback (verified owner)

    help sleep and recovery

  34. Avatar
    5 out of 5

    Christine Esparza (verified owner)


  35. Avatar
    4 out of 5

    ukaserex (verified owner)

    Candidly, my experiment with this product suggests that it does help with soft tissue injury. To be clear, when using it, I’m able to do more very high repetition movements with no ill effects, yet when I’m not, I seem to suffer more prolonged discomfort in my joints.

    As far as gaining muscle mass, I’ve yet to determine if this product aids in this effort aside from the aforementioned benefit of not having pain in my joints.

    Also candidly, this site offers stacks for a reduced price, so it’s difficult to know which SARM is doing what. I can say that the stacks seem to help. But, I cannot definitively quantify how much they help. Is it better sleep, or diet that leads to the desired results, in conjunction with the sarms and a solid workout plan? If I could answer that, these wouldn’t be for experimentation only, right?

  36. Avatar
    5 out of 5

    Kris (verified owner)

    subject experienced great sleep and growth

  37. Avatar
    5 out of 5


    Positive effects on muscle mass! Hungry as a fucking ox!

  38. Erik Bugarin
    5 out of 5

    Erik Bugarin (verified owner)

    Lab subject appetite increased, as well as better quality sleep. Lab subject also has noticeable trimmed waist, and better nutrient absorption from meals.

  39. Avatar
    5 out of 5

    MiaG (verified owner)

    Like this product it is helping a lot with cutting.

  40. Avatar
    5 out of 5

    Mjjc5291 (verified owner)

    Overall favorite! Recovery and sleep increase while strength and muscle mass also increased! Great when stacking with other supplements. Highly recommend!

  41. Avatar
    5 out of 5

    Shahin Gharagozlu

    this stacked with rad-140 and Osterine is the perfect supplement to subject’s training. crazy gains.

  42. Avatar
    5 out of 5

    John Pontieri (verified owner)

    Product is excellent! Put on 10 pounds of muscle mass in a little over 40 days. Was not expecting these results at all. Side effects are minimal, however skin has benefited greatly.

  43. Avatar
    4 out of 5

    Larry Gabriel (verified owner)

    Good for sleep, hair, appetite

  44. Avatar
    5 out of 5

    Eric Bils (verified owner)

    Saw great results. In 2 weeks my subject went from 160-167 and plateaued after. Increase in strength, and slight endurance in the gym. Definitely recommend.

  45. Avatar
    5 out of 5

    Eliran (verified owner)

    reserch subject has been using this for about 2 years now, and these are the reserch conclusions-
    1. first cycle was for about 3 months , the peels from s4y, didnt have noticable results or side affects.
    2. after he reserched sarms from sarmtech and seen outstanding results, we decided its better to reserch again with sarmtech mk, and the first noticeable affect was a very incresed hunger at first 2 days and was almost unmanegeable, than it decresed a bit for the next 2 weeks and was manageable. after that apparently the body found its way to balance itself and there wasnt any hunger feeling anymore. that cycle went for 2 months and was while cycling other sarms so ofcourse any anabolic reaction cant be relate to mk.
    3. after that cycle, rs decided to use mk as post cycle therapy, and boy was it helpful. rs usualy looses almost half inch between cycles, and since using it, rs isnt loosing more than 1-2 mm top! and also keeps his force from the cycle.
    4. rs than decided to use it on permanent basis, and tried 2 pills. that made rs loose feeling in his fingers, which is normal by hormonal changes. but it wss sometimes so annoying it was hard to write! rs had to take 2 months off until it past completely.
    5. than rs decided to try again with only 1 pill. its now about half a year and no numb feeling ,thanks to god!

    for the muscle gaining conclusion, rs might not had any noticeable gaining from mk, because hes using sarms, and on cycle u will gain with or without mk, and off cycle u will loose some no matter whar u do, but not to loose almost any strength or size on post cycle, is a poof that it can make gains if it was used by itself.
    6. for overall feeling, rs is 32 years old, and feeling a bit more flexibility that he loosed a bit at the past few years.
    7. rs had annoying tennis elbow that wasnt getting better using mk, until he took prp treatment that solve that problem.
    8. as height increaser, rs is measuring his height weekly at the past few years to see if prohormones or sarms can increase heifht like some very few people reported. very accurate measure with iron ruler, morning and evening. never seen a change. but the last half year since using mk on daily basis, rs grew 5 mm. morning and evening height, which was
    big surprise for him. but rs had a short cycle with anabolic steroids, which might should be credited for that. this should further be explored.
    8. sarmtech are the best sarms source. end of discussion.

  46. Avatar
    5 out of 5

    Ryan Pearson (verified owner)

    Great results! Quality product. A+

  47. Avatar
    5 out of 5

    Chad Mayeran


  48. Avatar
    5 out of 5

    Merman (verified owner)

    This is amazing especially with no PCT that is required.

  49. Avatar
    5 out of 5

    Larry Gabriel (verified owner)

    Good for sleep and recovert

  50. Avatar
    5 out of 5

    Aaron Abbott (verified owner)

    Works great

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MK-677 (Ibutamoren), 15 mg