MK-677 (Ibutamoren) Protocol Guide
MK-677 (Ibutamoren) is an orally active growth hormone secretagogue that mimics ghrelin to stimulate sustained GH and IGF-1 elevation over 24 hours per dose. Unlike injectable GHRPs, MK-677 requires no reconstitution or injection. This protocol covers oral dosing at 10-25mg daily before bed, the critical importance of blood glucose monitoring, appetite and water retention management, expected timelines, and cycling recommendations.
Protocol Overview
- Compound
- MK-677 (Ibutamoren Mesylate)
- Category
- Oral GH Secretagogue (Ghrelin Mimetic)
- Mechanism
- Orally active ghrelin mimetic that binds GHS receptors for sustained 24-hour GH release and IGF-1 elevation
- Molecular Weight
- 624.77 Da
- Half-Life
- ~4-6 hours plasma (pharmacodynamic duration ~24 hours supports once-daily dosing)
- Form
- 25mg capsules or liquid (oral)
- Route
- Oral
- Frequency
- Once daily
- Cycle Length
- 8-16 weeks
Dosing Protocol
| Protocol | Weeks | Dose | Timing | Route |
|---|---|---|---|---|
| Standard | 1-12+ | 25 mg | Before bed | Oral |
| Conservative | 1-8 | 10-15 mg | Before bed | Oral |
| Low-dose Long-term | 1-24 | 10 mg | Before bed | Oral |
Key: No reconstitution needed. Take before bed to align with natural GH release and minimize waking appetite. Can take with or without food.
Administration
How to Take
- Oral capsule or measured liquid
- No injection required
- Swallow with water before bed
Timing & Storage
- Time: Before bed (preferred)
- Consistency: Same time daily
- Storage: Room temperature, away from light
Expected Timeline
Side Effects & Monitoring
Common
- Increased appetite (significant)
- Water retention / bloating
- Vivid dreams / drowsiness
- Numbness/tingling in hands
- Elevated fasting blood glucose
Serious
- Insulin resistance (prolonged use)
- Significant edema
- Joint pain from fluid shifts
- Elevated prolactin (uncommon)
Critical: Monitor fasting blood glucose regularly. MK-677 can cause insulin resistance. Consider berberine or chromium for glucose management.
Stacking
Compatible
- CJC-1295/Ipamorelin: Alternate days
- BPC-157: Recovery support
- Berberine: Blood glucose management
- Cardarine: Metabolic offset
Notes
- Monitor glucose closely with any stack
- Avoid other GH secretagogues on same days
- High-protein, moderate-carb diet recommended
Blood Work (Critical)
| Panel | Markers | Timing |
|---|---|---|
| Metabolic (Priority) | Fasting glucose, HbA1c, fasting insulin, HOMA-IR | Baseline, Week 4, 8, 12 |
| GH Axis | IGF-1 | Baseline, Week 4, 8 |
| Hormonal | Prolactin, cortisol | Baseline, Week 8 |
| Basic | CBC, CMP, lipids | Baseline, Week 8 |
Frequently Asked Questions
Yes, MK-677 can elevate fasting blood glucose and reduce insulin sensitivity, especially at 25mg with extended use. Regular glucose monitoring is essential. Berberine or chromium may help mitigate this.
Standard cycles are 8-16 weeks. Some use 10mg long-term (up to 6 months) with metabolic monitoring. Cycling 8 on / 4 off is conservative.
Taking MK-677 before bed aligns with the natural nocturnal GH surge, maximizing the GH pulse. It also helps avoid the significant appetite increase during waking hours, as the ghrelin-mimetic effect peaks 1-2 hours post-dose.