MK-677 (Ibutamoren)

3 articles in this topic.

Why MK-677 Isn't a Peptide (But Gets Grouped with Them)

MK-677 (ibutamoren) is a small molecule, not a peptide. It mimics ghrelin at the same receptor that GHRPs target. Here's why the distinction matters.

13 min read|Mar 26, 2026

MK-677 (Ibutamoren)

MK-677 Side Effects: What the Clinical Data Shows

MK-677 ibutamoren side effects from clinical trials: water retention, insulin resistance, hunger, and long-term safety data from the Nass and Svensson studies.

14 min read|Mar 22, 2026

MK-677 (Ibutamoren)

MK-677 and Sleep: Deep Sleep and REM Effects

MK-677 (ibutamoren) increased stage IV deep sleep by 50% and REM sleep by 20-50% in clinical studies. Full review of the sleep architecture data.

13 min read|Mar 22, 2026