Cyclic Glycine-Proline vs Ipamorelin
Moderate Research vs Well Studied
monitor Mechanism-based · 47% Both Cyclic Glycine-Proline and Ipamorelin affect insulin sensitivity or blood glucose. Monitor fasting glucose and HbA1c. Consider adding an insulin sensitizer (metformin/berberine).
Molecular Data
Cyclic Glycine-Proline Ipamorelin
Weight 154.17 Da 711.85 Da
Half-life Extended stability (more stable than linear GPE precursor) ~2 hours
Chain 2 amino acids (cyclic) 5 amino acids
Type Cyclic dipeptide (2,5-diketopiperazine) Growth hormone secretagogue
Key Benefits
Cyclic Glycine-Proline
01 Neuroprotection and cognitive enhancement
02 IGF-1 optimization
03 Cardiovascular support
04 Metabolic health improvement
05 Blood-brain barrier penetration
06 Convenient oral administration
Ipamorelin
01 Optimal GH stimulation with superior bioavailability
02 Body composition improvements (lean mass, fat loss)
03 Enhanced recovery and anti-aging effects
04 Minimal side effects compared to other GHRPs
05 No significant cortisol or prolactin elevation
06 Improved sleep quality
Dosing Protocols
Cyclic Glycine-Proline
20-100 μg daily (or 300mg blackcurrant extract 2x daily) / Once daily, preferably in the morning
Ipamorelin
200-300 mcg per injection / 1-3 times daily depending on goals (1x for longevity, 2-3x for performance)
General Health & Longevity 200mcg 1x daily before bed
Body Composition 250-300mcg 2x daily (morning, pre-workout)
Athletic Performance 200-250mcg 2-3x daily
Sleep & Recovery 200mcg 1x daily 30min before bed
Anti-Aging Protocol 200-250mcg 1-2x daily
Side Effects
Cyclic Glycine-Proline
Ipamorelin
Mild hunger increase 20-30 minutes post-injection
Slight drowsiness when taken before bed
Water retention (mild)
Contraindications
Consult healthcare provider if taking IGF-1 or growth hormone medications
Limited long-term human data available
Not studied in pregnancy
Pregnancy or breastfeeding
Active cancer or history of cancer
Severe kidney or liver disease
Research Evidence
Cyclic Glycine-Proline Ipamorelin
Status Moderate Research Well Studied
References 4 studies 5 studies
Latest — October 2024
FDA Approved No No
This comparison is for educational and research purposes only. Consult a healthcare professional before use.