Tiers name what a vendor publishes, not a verdict on any product's purity or quality.
Lab-verifiable COAs: certificates that open on the testing lab's own site (the seal's ring shows what share of them do).
Third-party COAs: certificates attributed to a third-party lab, which may be hosted only on the vendor's site.
Tiers follow the Vendor Score (90+ and 80–89), which is 87% COA evidence; the numeral in each seal is that score.
Affiliate relationships never affect tiers, selection or order. How the Vendor Score works
A nine-amino-acid neuropeptide studied in research on social-bonding and signaling pathways.
Evidence brief
Oxytocin is a hypothalamic neuropeptide and reproductive hormone, long established and widely used in obstetrics for its role in labor and its contraction of milk-duct cells during breastfeeding.
Approved as an obstetric injectable, and only as that: FDA-approved as Pitocin (NDA 018261) to induce or stimulate labour and to control postpartum bleeding, and authorised across the EU (e.g. Syntocinon in Spain) and the UK as an infusion. No intranasal or general-wellbeing oxytocin product is approved in the US, EU or UK. Research use only — not medical advice.
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Oxytocin · all tracked vendors · all tracked peptide listings, including out-of-stock products. Prices and stock reflect the last check. Non-comparable products do not enter market rankings. Trust scores measure published evidence, not product safety.
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COACertificate of Analysis: a lab report stating a batch's measured identity and purity.Certificate of Analysis: a lab report stating a batch's measured identity and purity. availability: 42 of 44 tracked sources for Oxytocin publish a COA
— 31 with at least one certificate you can open at the testing lab : Modern Research Peptides (276 at the lab) , Iron Aminos (250 at the lab) , EZ Peptides (136 at the lab) , Ameano Peptides (108 at the lab) , RUO.bio (91 at the lab) , Nationwide Peptides (88 at the lab) , NuScience Peptides (87 at the lab) , Feel Good Peptides (82 at the lab) , Paramount Peptides (81 at the lab) , Tegridy Research (81 at the lab) , MOG Labs (78 at the lab) , My Amino Lab (64 at the lab), and 30 more — every one of them is a linked row in the table above. What a COA proves →
● Oxytocin blends & stacks · 3 first-partypriced by total — not $/mg
Multi-peptide products (e.g. BPC-157 + TB-500). We don't rank these by $/mgPrice divided by the milligrams of active compound — the like-for-like way to compare cost across different vial sizes.Price divided by the milligrams of active compound — the like-for-like way to compare cost across different vial sizes. — a per-milligram figure across different peptides isn't comparable — so they're listed separately by total price and kept out of the headline index above.
Oxytocin is a hypothalamic neuropeptide and reproductive hormone, long established and widely used in obstetrics for its role in labor and its contraction of milk-duct cells during breastfeeding.
Source-linked reference figures with the population and study context alongside each amount. Study arms are not a starting dose, titration schedule, or personal treatment plan. Label records refer to the named approved medicine, not vendor products.
FDA-approved label dose
10 units
human · control of postpartum uterine bleeding, given after delivery of the placenta · FDA label (Pitocin) · Route reported: intramuscular
published in international units, which do not convert to a mass
Research use only — this reports what an FDA label or a peer-reviewed study published, tied to its species and study context. It is not medical advice, not a recommendation to use, and no dose here is generated by pepmg. Any dosing decision is for a qualified professional. Animal-study amounts do not establish a human dose.
All products listed are sold by third-party vendors for laboratory and research use only (RUO). Where an FDA label or a peer-reviewed study has published a dose, pepmg reports it with the source named, because that is safer than guessing. It is a report, not medical advice and not a recommendation to use anything. pepmg sells nothing and ships nothing. Listings are price-tracking data, not endorsements.
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