Growth hormone

MK-677 Tracker

MK-677 is an orally active growth hormone secretagogue — not actually a peptide, though it is almost always grouped with them. This page covers its half-life, what that timescale means for keeping a usable record, and how it changes the shape of a log — not what to take or how much.

Recordkeeping reference, not medical guidance. This page describes published pharmacokinetic estimates and how they affect logging. It does not recommend MK-677, any amount, or any schedule, and it is not a claim that this compound is safe, effective, or approved for any use. Talk to a qualified healthcare professional.
Half-life24 hrbiological
Activity window24 hrestimated
Time to clear5 days~5 half-lives

What MK-677's timing means for tracking

Two things set MK-677 apart from everything else on this site. It is taken orally, so there is no vial, no bacteriostatic water, and no syringe math at all. And it is not a peptide — it is a small molecule that happens to act on the same pathway, which is why it ends up in peptide catalogues anyway.

Its half-life is around 24 hours, which is long enough that levels build across consecutive daily entries and reach a rough steady state after roughly five days. That is a genuinely different pattern from the injectable secretagogues, which clear within hours.

For recordkeeping the oral route simplifies things: no concentration to store, no unit count to recompute when a vial is mixed differently. What matters is the date, the amount, and consistency — because at a 24-hour half-life a missed day is a visible dip rather than a rounding error.

What to capture in the log

No reconstitution needed

MK-677 is taken orally, so there is no vial to mix, no bacteriostatic water, and no syringe unit conversion. If you are tracking injectable compounds alongside it, the reconstitution calculator covers those.

Frequently asked questions

What is the half-life of MK-677?

About 24 hours, long enough that daily entries overlap and reach a rough steady state after roughly five days.

Is MK-677 a peptide?

No. It is an orally active small molecule that acts on the growth hormone secretagogue pathway. It is grouped with peptides by convention rather than by chemistry.

Do I need to reconstitute MK-677?

No. It is taken orally, so there is no vial to mix, no bacteriostatic water, and no syringe unit calculation.

Is Ibutamoren the same thing?

Yes, Ibutamoren is another name for MK-677 and PepTrack records it as an alias.

Track MK-677 without the mental math

PepTrack stores the schedule, the log, and the concentration together, and draws the estimated level using the same half-life figures shown above. Free on iPhone, no account required.

Download on the App Store