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 peptide, which means it is a short chain of tiny building blocks called amino acids. Your body makes it naturally.
Vasopressin
ApprovedAlso: [Arg8]-Vasopressin (AVP), Argipressin Acetate
Vasopressin is a natural chemical messenger in the body. It is also called the antidiuretic hormone.
At a Glance
| Oxytocin | Vasopressin | |
|---|---|---|
| Research status | Approved | Approved |
| Highest-tier evidence | Peer-reviewed study | Peer-reviewed study |
| Research citations | 72 | 43 |
| 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
72 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
43 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.
1993 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