Does MK-677 improve sleep quality?

Yes. Clinical studies by Copinschi et al. (1997) demonstrated that MK-677 at 25mg significantly increased both REM sleep duration (by approximately 50%) and Stage 4 deep sleep (by approximately 20%) in healthy young men. These are the two most restorative sleep phases — REM for cognitive processing and deep sleep for physical recovery and GH release. Many users report more vivid dreams and feeling more rested upon waking.

No. MK-677 (ibutamoren) is a non-peptide growth hormone secretagogue. It

What is the best MK-677 dose for sleep?

For sleep optimization specifically, 10-15mg taken 30-60 minutes before bed is the recommended starting range. This dose provides meaningful sleep architecture improvement while minimizing side effects like hunger and water retention. The clinical studies used 25mg, but many users find lower doses sufficient for sleep benefits. Start at 10mg for 2 weeks to assess tolerance before considering dose increases.

Does MK-677 cause hunger at night?

MK-677 activates ghrelin receptors, which are the primary hunger signaling pathway. Taking it before bed means the peak hunger signal occurs during sleep, which most people sleep through. However, some users report waking up hungry or having intense hunger upon waking. This typically moderates after 2-4 weeks. Starting at a lower dose (10mg) and having a protein-rich bedtime snack can help manage this effect.

How does MK-677 compare to ipamorelin for sleep?

Both enhance overnight GH release but through different mechanisms. MK-677 is oral and mimics ghrelin (hunger hormone), while ipamorelin is an injectable peptide that selectively targets the GH secretagogue receptor without ghrelin

Can MK-677 raise blood sugar levels?

Yes. Growth hormone is a counter-regulatory hormone to insulin, meaning sustained GH elevation can increase fasting blood glucose. In clinical studies, MK-677 caused modest increases in fasting glucose and insulin levels, particularly in elderly subjects. Those with diabetes, pre-diabetes, or insulin resistance should monitor blood glucose closely and consult a physician. Berberine or metformin are sometimes used adjunctively to manage this effect.