PeptilotOpen the web app — 3 days free

MK-677 (Ibutamoren) half-life

MK-677 (Ibutamoren) has an elimination half-life of approximately 24 hours. Here is what that means for how long a single dose stays in your system.

100%50%25%12.5%12340days after a single dose
Simple single‑compartment elimination model ((1/2)t/t½): it ignores absorption, route, and individual variation, so treat it as a shape, not a measurement. In the Peptilot app this curve is stacked across your actual logged doses.

Clearance milestones

MilestoneTime after a single dose
50% eliminated~24 h
75% eliminated~2 days
90% eliminated~3.3 days
~97% eliminated (≈5 half-lives)~5 days

About MK-677 (Ibutamoren)

MK-677 (Ibutamoren) is an orally active growth-hormone secretagogue and ghrelin-receptor agonist studied for its effect on growth-hormone and IGF-1 levels. Note: it is a non-peptide small molecule, not a peptide, despite often being grouped with growth-hormone peptides. This entry is informational and is not a recommendation to use the compound.

See the full MK-677 (Ibutamoren) compound page, or compare against other compounds on the half-life overview.

Questions, answered.

What is MK-677 (Ibutamoren)'s half-life?
MK-677 (Ibutamoren)'s elimination half-life is approximately 24 hours, based on published pharmacokinetic data. That means about half of a dose is eliminated in that time, half of the remainder in the next interval, and so on.
How long does MK-677 (Ibutamoren) stay in your system?
Using the ~5-half-lives rule of thumb, a single dose of MK-677 (Ibutamoren) is roughly 97% eliminated after ~5 days. Actual clearance varies with dose history, route, and individual metabolism — treat this as an educational estimate, not a measurement.
Do levels build up with repeated doses?
Yes — if a new dose lands before the previous one is eliminated, the remainders stack. With consistent dosing, estimated levels reach steady state after roughly four to five half-lives. Peptilot's Levels feature stacks this exact curve across your logged doses so you can see the estimate for your own history.

Educational information for people who track their protocols — not medical advice, and never a recommendation to use any compound. Always work with a qualified healthcare provider.

Peptilot charts your estimated MK-677 (Ibutamoren) levels from the doses you actually log — in any browser, free for your first 3 days.

Open the web app — 3 days freeLearn more about Peptilot