Oxytocin
otherOxytocin is a research-use-only peptide. PeptideSource compares suppliers on purity, COAs, and price-per-mg.
Oxytocin functions by binding to oxytocin receptors, which are primarily found in the brain and the reproductive system. This peptide is a naturally occurring hormone produced in the hypothalamus and released by the posterior pituitary gland. Initial research into oxytocin began with its role in childbirth and lactation, where it was identified as crucial for uterine contractions and milk ejection during breastfeeding. Scientific interest expanded as researchers explored its influence on social bonding, trust, and emotional regulation. Today, it is primarily studied for its effects on:
- Social bonding and trust
- Emotional regulation
- Uterine contraction
- Lactation
Secondary research interest includes its effects on stress and anxiety.
PeptideSource editorial · Updated Jul 18, 2026
For research use only. PeptideSource does not sell peptides directly. Compare third-party supplier listings at your own discretion.
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| Product | Oxytocin Spray Premium | Oxytocin | Oxytocin | Oxytocin | Oxytocin Non-Lyophilized | Oxytocin Spray Non-Lyophilized | Oxytocin Premium | Oxytocin | Oxytocin 6000 IU | Oxytocin | Oxytocin | Oxytocin | Oxytocin - | Oxytocin | Oxytocin |
| Size | 10 mg | 10 mg | 10 mg | 10 mg | 5 mg | 5 mg | 5 mg | 2 mg | 2 mg | 2 mg | |||||
| Price | $27.99 | $33.75 | $35.00 | $45.00 | $46.50 | $49.50 | $59.99 | $31.95 | $65.00 | $34.00 | $39.99 | $49.00 | $26.00 | $29.99 | $34.00 |
| Price/mg | $2.80/mg | $3.38/mg | $3.50/mg | $4.50/mg | $4.65/mg | $4.95/mg | $6.00/mg | $6.39/mg | $6.50/mg | $6.80/mg | $8.00/mg | $9.80/mg | $13.00/mg | $15.00/mg | $17.00/mg |
| Price change | 0% (16d) | 0% (10d) | 0% (16d) | 0% (16d) | 0% (16d) | 0% (16d) | 0% (16d) | 0% (16d) | 0% (10d) | 0% (10d) | 0% (10d) | 0% (10d) | 0% (10d) | 0% (10d) | 0% (10d) |
| Stock | Out of stock | In stock | Out of stock | In stock | In stock | In stock | Out of stock | In stock | In stock | In stock | In stock | In stock | Out of stock | Out of stock | In stock |
| Shipping | 5–7 days | 2–3 days | 2–5 days | Same-day dispatch | 5–7 days | 5–7 days | 5–7 days | 3–5 days | Same/next-day dispatch | Same-day dispatch before 12PM CT | Same-day US shipping | Same-day dispatch before 12PM EST | Same-day dispatch before 1PM PST | UPS 2nd Day Air | US shipping |
| Reviews | 4.3(159) | 5.0(22) | 4.8(271) | 4.9(15) | 4.3(159) | 4.3(159) | 4.3(159) | 2.6(12) | 1.0(4) | 4.6(63) | 4.7(31) | 5.0(1) | — | 5.0(6) | 5.0(9) |
| Purity | — | 99% | — | 99% | — | — | — | 99% | 99% | — | 99% | — | 99% | 99% | 99% |
| COA | — | — | — | — | — | — | — | — | — | — | — | ||||
| Bulk discount | — | — | — | — | — | — | — | — | — | 10% off (3+) | — | — | — | — | — |
