GPE vs NPY
Head-to-head comparison of GPE (Glycyl-L-prolyl-L-glutamic acid) and NPY (Neuropeptide Y) — benefits, dosing, side effects, research data, and where to buy.
| Property | GPE | NPY |
|---|---|---|
| Category | Cognitive Enhancement | Cognitive Enhancement |
| Full Name | Glycyl-L-prolyl-L-glutamic acid | Neuropeptide Y |
| Molecular Weight | 301.30 Da | 4272 Da |
| Half-Life | minutes | minutes |
| Amino Acids | 3 | 36 aa |
| Typical Dose | 0.1-10 mg/kg preclinical | 1-10 µg preclinical range |
| Route | Intranasal/Intracerebroventricular | Intranasal |
| Purity | ≥98% | ≥98% |
| Studies Count | 25 | 900 |
| Research Status | Pre-clinical | Pre-clinical |
GPE Benefits
- ✓memory consolidation
- ✓neuroprotection
- ✓synaptic plasticity
- ✓learning support
NPY Benefits
- ✓stress resilience
- ✓hippocampal protection
- ✓memory modulation
- ✓anti-excitotoxic signaling
GPE Dosing
intranasal or ICV research doses|0.1-10 mg/kg preclinical range|repeat daily or intermittent protocols
NPY Dosing
0.1-1 nmol ICV in rodents|1-10 µg intranasal in experimental work|acute or repeated stress-model protocols
GPE Side Effects
- ⚠limited human safety data
- ⚠short half-life
- ⚠local irritation with nasal delivery
NPY Side Effects
- ⚠sedation
- ⚠appetite increase
- ⚠blood pressure changes
Research Overview
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.
NPY
NPY has been shown in animal studies to protect neurons from excitotoxic injury and to dampen stress-linked cognitive impairment. It is often discussed as a counterbalance to overactive glutamatergic and stress pathways in the brain.
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