+50%
Stage IV deep sleep
REM sleep +20% in the same trial. Recorded with polysomnography in healthy young adults.
Copinschi et al., Neuroendocrinology, 1997
1 / 5Best sellerBatch #1213681 · 99.635% verified
Ibutamoren MK-677 · 120 Capsules
The oral growth hormone secretagogue, studied in 25+ human trials. Janoshik-verified 99.635% pure. 60 days in one bottle.
4.9 · 1,214 verified reviews- In research: +50% stage-IV deep sleep, +20% REM
- IGF-1 +55% in 2 weeks, +88% at 4 weeks (25 mg/day trials)
- One daily serving, ~24h half-life, oral, no injections
- Non-hormonal, no testosterone suppression, no PCT
Delivered every 60 days · Skip, reschedule, or cancel anytime. No fees.
60-day money-back guarantee · Janoshik COA · Discreet packaging
Batch #1213681 · 312 bottles remaining
Clinical data
What the published research recorded
MK-677 is one of the most-studied compounds in its class. These numbers come from peer-reviewed human trials.
+88%
IGF-1 at 4 weeks
+55% within the first 2 weeks at 25 mg daily. IGF-1 is the primary growth signal GH produces.
Chapman et al., JCEM, 1996
+3 kg
Fat-free mass in 8 weeks
Versus placebo, without a training program. Recorded by whole-body composition analysis.
Murphy et al., JCEM, 1998
2 yrs
Sustained elevation
GH and IGF-1 restored to young-adult range and held there. No desensitization observed.
Nass et al., Annals of Internal Medicine, 2008
Findings reported from published clinical research on MK-677; study populations and protocols vary. Full citations on the Science page.
Verified buyers
Rated 4.9 by 1,214+ verified buyers
Sleep
The sleep alone is worth it
I bought this for recovery but the sleep is what sold me. By night four I was sleeping like I did at 19: heavy, full nights, waking up before the alarm. Recovery between leg days is noticeably faster.
MTMarcus T.Verified
Testing
COA actually matches the batch
I emailed asking about the lab report and they sent the Janoshik PDF for my exact batch number within the hour. 99.6% purity, tested this year. That's the whole reason I switched from my old liquid vendor.
JRJake R.Verified
Training
8 weeks in, scale up 4kg, waist same
Eating in a small surplus and lifting 5x a week. Up 4kg with the same waist measurement. Pumps are ridiculous and my elbows stopped clicking. Capsules beat measuring out liquid every night.
DKDan K.Verified
Honesty
Real, but respect the hunger
The timeline on their site is accurate: appetite is no joke the first two weeks, exactly like they say. Sleep and fullness are obvious by week three. Would be 5 stars if the 3-pack was always in stock.
CMChris M.Verified
Service
Finally a vendor that feels legit
Discreet packaging, batch number printed on the bottle matching the public COA, arrived in two days. This is how every vendor in this space should operate. Third order incoming.
TBTomas B.Verified
Recovery
Joints feel 25 again
I'm 41. Two decades of heavy pressing wrecked my shoulders. Six weeks in and I'm pressing pain-free for the first time in years. Skin and nails growing like weeds too. Something is clearly happening.
RPRyan P.Verified
60days
Risk, reversed
The 60-Day Empty-Bottle Guarantee
Run it for the full 8 weeks the clinical trials ran. If you're not satisfied, email us for a 100% refund, even if the bottle is empty. No forms. No return shipping. No restocking fees. No hard feelings.
Straight answers
Questions we actually get asked
No dodging. If your question isn't here, the full FAQ goes deeper, or email us and a human answers within 24 hours.
MK-677 is one of the most-studied compounds in its class. In a randomized trial, 25 mg daily raised IGF-1 55% within two weeks and 88% by week four. A 2-year study in Annals of Internal Medicine found GH and IGF-1 remained elevated with no desensitization. Every citation is on our Science page. We didn't write the numbers, the journals did.