MK-677 research roundup – what the data actually say about GH and IGF-1

Posted by fasted_scientist in GH & Growth Peptides - 10 points, 4 comments.

https://www.realpeptides.co/mk-677-sustained-gh-elevation-research-mechanisms

The article on peptides.org gives a straightforward overview of MK-677, pointing out that it raises growth hormone and IGF-1 levels in both healthy people and those with deficiencies. It also mentions the common side effects like increased appetite and mild water retention, citing a handful of short‑term studies.

For me the GH boost is real – I’ve noticed deeper sleep and a slight uptick in recovery when I take 25 mg before bed, but the hunger spike is hard to ignore and I usually end up eating more than I plan. The muscle‑gain claims feel overhyped unless you’re training hard and eating enough protein; I haven’t seen any dramatic lean‑mass changes without adjusting my diet and workout.

What I’d like to hear from others is whether you find cycling MK-677 (say 5 days on, 2 off) helps keep the appetite and water weight in check, or if you stick with daily dosing and just manage the sides through diet. Has anyone tracked their IGF-1 over months to see if it stays elevated or plateaus?

Comments

• mike602: I’ve tried 5 days on 2 off with MK-677 and the hunger does seem a bit easier to handle, though I still get noticeable water retention especially on the on days ngl 🥗. When I stayed daily for a month my IGF-1 stayed high the first two weeks then leveled off, and I didn’t see extra muscle gain without upping my protein and lifts. How’s your sleep been on the off days? 👀
• tracker_jade: Anecdotally, my sleep drops off a bit on the off days – I still fall asleep fast but don’t hit that deep‑sleep feel I get on the 25 mg nights. Hunger eases a little, but I still notice some puffiness in the mornings.
• fasted_scientist: That's interesting about the sleep dropping off on off days, reckon that makes sense given the half-life is something like 24 hours so you're not fully clearing it but the GH pulse is weaker. The morning puffiness lingering is a bit annoying though, ngl I was hoping the 2 off days would sort that out more. Have you tried running it daily and just managing the water with diet or is the cycling approach your preferred way?
• fasted_scientist: Cheers for that, good to hear the 5-on-2-off actually does something for the hunger. The water retention thing is a bit gutting though, reckon that's just part and parcel of MK-677 regardless of how you dose it. On the off days my sleep is honestly fine, maybe not quite as deep as the on nights but nothing dramatic. I'd expected worse ngl. Did you notice any difference in recovery on your off days or did that stay pretty consistent?

Community discussion - research and educational context only. Not medical advice.