Ibutamoren (MK-677) Oral (Ibutamoren Mesylate (MK-677))
An oral growth hormone secretagogue commonly prescribed by telemedicine clinics as a convenient alternative to injectable GH peptides. Provides sustained GH/IGF-1 elevation with once-daily oral dosing.
How it works
Mimics ghrelin at the GHS-R1a receptor in the pituitary and hypothalamus, stimulating sustained GH release without suppressing natural pulsatility. Also increases appetite via ghrelin pathway activation.
Key facts
- Molecular weight: 528.66 Da
- Half-life: ~24 hours
- Bioavailability: ~60% oral
- Storage: Room temperature.
Dosing overview
- Typical dose: 10-25 mg
- Frequency: Once daily (evening)
- Duration: 12-24 weeks or longer
- Route: Oral capsule or liquid
Protocol notes
- Most run 12.5-25 mg once daily; 25 mg is the common ceiling for body-composition goals.
- Evening dosing is typical to support sleep and align with the overnight GH pulse.
- Expect noticeable hunger and some water retention, especially in the first weeks.
Reported benefits
- Elevated IGF-1 levels
- Improved sleep quality
- Enhanced recovery
- Increased lean mass
- Better skin/hair
- Convenient oral dosing
Possible side effects
- Increased hunger
- Water retention
- Numbness/tingling
- Elevated blood sugar
- Lethargy
- Vivid dreams
Research
- MK-677 long-term GH elevation safety (2021): Maintained elevated IGF-1 levels for 12+ months without tachyphylaxis or significant adverse events in healthy adults.
Community reviews of Ibutamoren (MK-677) Oral
- n_of_one rated it 5/5 - Genuinely effective after 3 months: Been using Ibutamoren (MK-677) Oral for about 3 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- evidence_eli rated it 5/5 - Solid compound with real results: Been using Ibutamoren (MK-677) Oral for about 4 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- stacked_dave rated it 5/5 - Consistent improvement over 2 weeks: Added Ibutamoren (MK-677) Oral to my protocol about 2 weeks ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- quiet_gains rated it 5/5 - Worth adding to the protocol: Ibutamoren (MK-677) Oral has been a worthwhile addition. I am data-driven and tracked relevant markers before, during, and after. The improvement is measurable and correlates with the intervention timeline. What sets this apart from some compounds I have tried is the consistency. Benefits did not fluctuate wildly or disappear. They built up and maintained. That gives me confidence in the mechanism. Tolerance has been excellent. Nothing in my bloodwork or subjective experience raised any flags. This is the kind of compound that does its job quietly without causing problems. Exactly what you w
- cycling_chad rated it 4/5 - Noticed clear benefits within weeks: Added Ibutamoren (MK-677) Oral to my protocol about 4 months ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
Compare Ibutamoren (MK-677) Oral
Research and educational reference only. Not medical advice.