Neuropeptide S vs Arginine Vasopressin
Head-to-head comparison of Neuropeptide S (Neuropeptide S) and Arginine Vasopressin (8-Arginine Vasopressin) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Neuropeptide S | Arginine Vasopressin |
|---|---|---|
| Category | Cognitive Enhancement | Cognitive Enhancement |
| Full Name | Neuropeptide S | 8-Arginine Vasopressin |
| Molecular Weight | 2203 Da | 1084.23 Da |
| Half-Life | Minutes to <1 hour | 10-20 minutes |
| Amino Acids | 20 | 9 |
| Typical Dose | Research-only; no validated human dose | 10-40 IU intranasal research range |
| Route | Intracerebroventricular/Intranasal | Intranasal/Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 28 | 100 |
| Research Status | Pre-clinical | Clinical |
Neuropeptide S Benefits
- ✓anxiolysis
- ✓stress resilience
- ✓attention support
- ✓arousal modulation
Arginine Vasopressin Benefits
- ✓memory consolidation
- ✓recall support
- ✓arousal-linked learning
- ✓social cognition
Neuropeptide S Dosing
0.1-1 nmol i.c.v. in animal studies|intranasal research-only exploration|no established human protocol
Arginine Vasopressin Dosing
intranasal research dosing|10-40 IU per dose in studies|single or repeated administration
Neuropeptide S Side Effects
- ⚠sleep disruption
- ⚠headache
- ⚠jitteriness
Arginine Vasopressin Side Effects
- ⚠blood pressure elevation
- ⚠headache
- ⚠hyponatremia
Research Overview
Neuropeptide S
Animal studies suggest NPS can reduce anxiety-like behavior while altering wakefulness and alertness through the NPS receptor system. Human cognitive data are very limited, and it has no approved clinical indication.
Arginine Vasopressin
Animal and human studies indicate vasopressin can modulate hippocampal and limbic circuits involved in learning and memory. The effect size is context dependent, and results vary by dose, route, and baseline cognitive state.
Ready to buy?
Find both peptides from our verified, lab-tested vendors with purity certificates and third-party testing.