Oxytocin vs Vasopressin
Sister nonapeptides from the same hormone family, studied for bonding, trust, stress, and social behavior — the classic contrast pair in social-neuroscience research. Here's a neutral, sourced side-by-side — no hype, every claim links to its evidence.
Oxytocin
ApprovedOxytocin is a natural substance made in the brain. It acts like a messenger in the body.
Vasopressin
ApprovedAlso: [Arg8]-Vasopressin (AVP), Argipressin Acetate
Vasopressin is a natural hormone found in the body that helps control water balance and blood pressure. It is often used by doctors in hospital settings to help patients who are in shock or have very low blood pressure.
At a Glance
| Oxytocin | Vasopressin | |
|---|---|---|
| Research status | Approved | Approved |
| Highest-tier evidence | Peer-reviewed study | Peer-reviewed study |
| Research citations | 98 | 55 |
| Dosing routes | SubQ | SubQ |
| Receptor targets | — | — |
| Half-life | — | — |
| Known side effects | 13 | 10 |
Research Areas
Top preclinical research areas — cited studies for each.
Oxytocin
- Extends lifespan in old frail male mice
- Increases healthspan and physical performance in male mice
- Improves short-term memory and endurance in male mice
- Rejuvenates fertility in middle-aged female mice
- Cardiovascular Protection and Atherosclerosis Suppression
Vasopressin
- Induction of courtship behavior (body undulation)
- Modulation of olfactory response to female odors
- Fever induction as a defense mechanism
- Optimization of lymphoid cell function at elevated temperatures
- Conserves fluid volume by reducing water excreted in urine
How People Use It
Reported routines — research only, not medical advice.
Oxytocin
- SubQ — 1 μg/g-day
- SubQ — 8 × 10^-12 to 2 × 10^-11 M
- SubQ — Not specified
Vasopressin
- SubQ — 50 or 100 µg
- SubQ — 1 µg
The Evidence
Key studies — click through to verify each on PubMed.
Oxytocin
98 sourced studies
- Source
Oxytocin enables novelty seeking and creative performance through upregulated approach: evidence and avenues for future research.
2015 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Oxytocin increases generosity in humans.
2007 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Oxytocin increases empathy to pain when adopting the other- but not the self-perspective.
2015 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Intranasal administration of oxytocin increases envy and schadenfreude (gloating).
2009 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
Vasopressin
55 sourced studies
- Source
Perturbations of arginine vasopressin secretion during inflammatory stress. Pathophysiologic implications.
2000 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
AVP arginine vasopressin [ Homo sapiens (human) ]
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Avp arginine vasopressin [ Mus musculus (house mouse) ]
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Vasopressin and oxytocin gene expression in the human hypothalamus
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
Decision Guide
How to Choose
Neither is a “winner” — they suit different goals. Compare the documented benefits and evidence above against what you’re actually trying to achieve, note the research status (approved vs research-stage), and read each full guide before deciding. Many people also stack peptides rather than pick one.
Source Oxytocin
Shop OxytocinSource Vasopressin