Secretin vs PACAP-38
Head-to-head comparison of Secretin (Human Secretin) and PACAP-38 (Pituitary Adenylate Cyclase-Activating Polypeptide-38 (human PACAP-38)) — benefits, dosing, side effects, research data, and where to buy.
| Property | Secretin | PACAP-38 |
|---|---|---|
| Category | Gastrointestinal | Cognitive Enhancement |
| Full Name | Human Secretin | Pituitary Adenylate Cyclase-Activating Polypeptide-38 (human PACAP-38) |
| Molecular Weight | 3055.4 Da | 4534 Da |
| Half-Life | 5-7 minutes | minutes |
| Amino Acids | 27 | 38 aa |
| Typical Dose | 0.2 mcg/kg IV | 10-100 µg preclinical range |
| Route | Intravenous | Intranasal |
| Purity | ≥98% | ≥98% |
| Studies Count | 800 | 650 |
| Research Status | Clinical | Pre-clinical |
Secretin Benefits
- ✓stimulates-pancreatic-secretion
- ✓supports-bicarbonate-release
- ✓aids-duodenal-pH-control
- ✓helps-digestive-coordination
PACAP-38 Benefits
- ✓synaptic plasticity
- ✓BDNF upregulation
- ✓neuroprotection
- ✓memory consolidation
Secretin Dosing
0.2 mcg/kg IV diagnostic dose|research infusion protocols|short bolus administration
PACAP-38 Dosing
0.1-1 nmol ICV in rodents|10-100 µg intranasal in preclinical studies|single-dose or short repeated protocols
Secretin Side Effects
- ⚠flushing
- ⚠nausea
- ⚠abdominal-cramping
PACAP-38 Side Effects
- ⚠headache-like effects
- ⚠flushing
- ⚠hypotension
Research Overview
Secretin
Secretin is a classic GI hormone with extensive physiology literature and established diagnostic use. It remains important for studying pancreatic secretory function, biliary responses, and duodenal feedback.
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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