Source comparison
MK-677 Study Comparison: Secretagogue vs Exogenous GH
GH Secretion Pattern Pulsatile (preserves natural rhythm) Constant elevation (suppresses endogenous pulses) MK-677 maintains hypothalamic-pituitary feedback; exogenous GH does not IGF-1 Elevation 60–90% above baseline 100–300% above baseline (dose-dependent) M
This comparison does not assign a generated winner or score.
- GH Secretion Pattern
- Pulsatile (preserves natural rhythm)
- Constant elevation (suppresses endogenous pulses)
- MK-677 maintains hypothalamic-pituitary feedback; exogenous GH does not
- IGF-1 Elevation
- 60–90% above baseline
- 100–300% above baseline (dose-dependent)
- MK-677 produces physiological elevation; GH often exceeds normal range
- Insulin Sensitivity
- Stable (HOMA-IR unchanged in 24-month trials)
- Often impaired (dose-dependent glucose intolerance)
- MK-677 safer for long-term metabolic health
- Administration
- Oral (once daily)
- Subcutaneous injection (daily or multiple times daily)
- MK-677 more practical for sustained use
- Regulatory Status
- Research compound (not FDA-approved for human use)
- FDA-approved for specific indications (GH deficiency, wasting syndromes)
- Exogenous GH legally available via prescription; MK-677 is not
- Cost (Estimated)
- $60–120/month (research-grade sources)
- $500–1500/month (pharmaceutical-grade)
- MK-677 significantly more accessible economically
- Professional Assessment
- Suitable for research into sustained IGF-1 elevation with minimal metabolic disruption
- Gold standard for severe GH deficiency but carries higher metabolic risk
- MK-677 occupies a middle ground. Less potent but safer long-term