Noopept vs GPE
Head-to-head comparison of Noopept (N-phenylacetyl-L-prolylglycine ethyl ester) and GPE (Glycyl-L-prolyl-L-glutamic acid) — benefits, dosing, side effects, research data, and where to buy.
| Property | Noopept | GPE |
|---|---|---|
| Category | Cognitive Enhancement | Cognitive Enhancement |
| Full Name | N-phenylacetyl-L-prolylglycine ethyl ester | Glycyl-L-prolyl-L-glutamic acid |
| Molecular Weight | 318.37 Da | 301.30 Da |
| Half-Life | 20-30 minutes | minutes |
| Amino Acids | N/A | 3 |
| Typical Dose | 10-30 mg/day | 0.1-10 mg/kg preclinical |
| Route | Oral | Intranasal/Intracerebroventricular |
| Purity | ≥98% | ≥98% |
| Studies Count | 60 | 25 |
| Research Status | Clinical | Pre-clinical |
Noopept Benefits
- ✓memory recall
- ✓learning efficiency
- ✓attention support
- ✓neurotrophic signaling
GPE Benefits
- ✓memory consolidation
- ✓neuroprotection
- ✓synaptic plasticity
- ✓learning support
Noopept Dosing
oral research use|10-30 mg per day in human studies|divided or single daily dosing
GPE Dosing
intranasal or ICV research doses|0.1-10 mg/kg preclinical range|repeat daily or intermittent protocols
Noopept Side Effects
- ⚠headache
- ⚠irritability
- ⚠sleep disturbance
GPE Side Effects
- ⚠limited human safety data
- ⚠short half-life
- ⚠local irritation with nasal delivery
Research Overview
Noopept
Noopept has been reported to increase NGF/BDNF-related signaling and improve performance in tasks involving learning and recall. Evidence includes preclinical studies and small human studies, but the overall literature is still modest compared with mainstream cognitive drugs.
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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