Cyclic Glycine-Proline vs Tesamorelin
Moderate Research vs FDA Approved
monitor Mechanism-based · 47% Both Cyclic Glycine-Proline and Tesamorelin affect insulin sensitivity or blood glucose. Monitor fasting glucose and HbA1c. Consider adding an insulin sensitizer (metformin/berberine).
Molecular Data
Cyclic Glycine-Proline Tesamorelin
Weight 154.17 Da 5,135.9 Da
Half-life Extended stability (more stable than linear GPE precursor) 26-38 minutes
Chain 2 amino acids (cyclic) 44 amino acids
Type Cyclic dipeptide (2,5-diketopiperazine) GHRH analog
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
Tesamorelin
01 FDA-approved formulation
02 Selective visceral fat targeting (15-20% reduction)
03 Proven clinical efficacy
04 Standardized dosing
05 37% liver fat reduction in NAFLD
06 Preserved subcutaneous fat
Dosing Protocols
Cyclic Glycine-Proline
20-100 μg daily (or 300mg blackcurrant extract 2x daily) / Once daily, preferably in the morning
Tesamorelin
1.4-2mg daily (FDA-approved: 2mg for HIV lipodystrophy) / Once daily (evening preferred for GH rhythm)
HIV Lipodystrophy (FDA-approved) 1.4mg Once daily
Visceral Fat Reduction 2mg Once daily
Anti-aging/Body Composition 1-2mg 5-7x weekly
NAFLD Treatment 2mg Once daily (12 months)
Cognitive Enhancement 1mg Once daily (20 weeks)
Side Effects
Cyclic Glycine-Proline
Tesamorelin
Injection site reactions (17%)
Joint pain (13%)
Water retention
Contraindications
Consult healthcare provider if taking IGF-1 or growth hormone medications
Limited long-term human data available
Not studied in pregnancy
Active malignancy
Pituitary disorders
Pregnancy
Research Evidence
Cyclic Glycine-Proline Tesamorelin
Status Moderate Research FDA Approved
References 4 studies 5 studies
Latest — June 2025
FDA Approved No Yes
This comparison is for educational and research purposes only. Consult a healthcare professional before use.