C-peptide vs GPE
Head-to-head comparison of C-peptide (Connecting peptide (C-peptide)) and GPE (Glycyl-L-prolyl-L-glutamic acid) — benefits, dosing, side effects, research data, and where to buy.
| Property | C-peptide | GPE |
|---|---|---|
| Category | Pain Management | Cognitive Enhancement |
| Full Name | Connecting peptide (C-peptide) | Glycyl-L-prolyl-L-glutamic acid |
| Molecular Weight | 3020.3 Da | 301.30 Da |
| Half-Life | ~20-30 min | minutes |
| Amino Acids | 31 | 3 |
| Typical Dose | no approved analgesic dose|research-only | 0.1-10 mg/kg preclinical |
| Route | IV|subQ | Intranasal/Intracerebroventricular |
| Purity | ≥98% | ≥98% |
| Studies Count | 46 | 25 |
| Research Status | Pre-clinical | Pre-clinical |
C-peptide Benefits
- ✓diabetic neuropathy research
- ✓nerve function support
- ✓possible analgesic effect
GPE Benefits
- ✓memory consolidation
- ✓neuroprotection
- ✓synaptic plasticity
- ✓learning support
C-peptide Dosing
0.5-1.0 mg/day in research|route varies by protocol
GPE Dosing
intranasal or ICV research doses|0.1-10 mg/kg preclinical range|repeat daily or intermittent protocols
C-peptide Side Effects
- ⚠injection-site reactions
- ⚠unknown long-term safety
GPE Side Effects
- ⚠limited human safety data
- ⚠short half-life
- ⚠local irritation with nasal delivery
Research Overview
C-peptide
C-peptide is not an approved analgesic, but multiple studies have examined its effects on peripheral nerve blood flow and neuropathy outcomes. The strongest relevance is in diabetic neuropathic pain rather than migraine.
GPE
Preclinical studies suggest GPE can reduce neuronal damage and support plasticity-related pathways in the brain. Research interest centers on hippocampal function, which links it to learning and memory paradigms.
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