BDNF vs PACAP-38
Head-to-head comparison of BDNF (Brain-Derived Neurotrophic Factor (mature BDNF)) and PACAP-38 (Pituitary Adenylate Cyclase-Activating Polypeptide-38 (human PACAP-38)) — benefits, dosing, side effects, research data, and where to buy.
| Property | BDNF | PACAP-38 |
|---|---|---|
| Category | Cognitive Enhancement | Cognitive Enhancement |
| Full Name | Brain-Derived Neurotrophic Factor (mature BDNF) | Pituitary Adenylate Cyclase-Activating Polypeptide-38 (human PACAP-38) |
| Molecular Weight | 13,700 Da | 4534 Da |
| Half-Life | minutes to hours | minutes |
| Amino Acids | 119 aa | 38 aa |
| Typical Dose | research-only microgram range | 10-100 µg preclinical range |
| Route | Intranasal | Intranasal |
| Purity | ≥98% | ≥98% |
| Studies Count | 8000 | 650 |
| Research Status | Pre-clinical | Pre-clinical |
BDNF Benefits
- ✓neurogenesis
- ✓synaptogenesis
- ✓LTP support
- ✓neuronal survival
PACAP-38 Benefits
- ✓synaptic plasticity
- ✓BDNF upregulation
- ✓neuroprotection
- ✓memory consolidation
BDNF Dosing
0.1-1 µg local or intranasal research delivery|viral or protein infusion models|acute or repeated plasticity protocols
PACAP-38 Dosing
0.1-1 nmol ICV in rodents|10-100 µg intranasal in preclinical studies|single-dose or short repeated protocols
BDNF Side Effects
- ⚠off-target neuroexcitation
- ⚠headache-like effects
- ⚠unknown systemic protein effects
PACAP-38 Side Effects
- ⚠headache-like effects
- ⚠flushing
- ⚠hypotension
Research Overview
BDNF
BDNF is repeatedly associated with learning, long-term potentiation, and recovery from neurologic injury in preclinical literature. Direct protein delivery is difficult, so most studies focus on pathways that raise endogenous BDNF or on localized experimental administration.
PACAP-38
PACAP-38 is one of the most studied endogenous neuropeptides for protecting neurons from ischemic and excitotoxic damage. Preclinical literature also links it to hippocampal plasticity and learning-related signaling, including increased BDNF expression.
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