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Oxytocin lab tests

64 certificates of analysis for Oxytocin are on file, from 48 shops and 14 labs. The latest was tested on .

These are certificates shops have chosen to publish, verified for authenticity before listing. Because shops decide which COAs to make public, the set reflects the batches they published rather than every production batch — a selection bias we state openly. What shop COAs show →

Tests on file
64
all single vials
Median purity
99.41%
usual 98.09–99.81% · shop COAs
Measured vs label
106%
median · 1 under 90% · 11 over 120%
Latest test
14 labs · 48 shops

What Oxytocin results look like

single vials only · 64 purity results · 60 measured-content results

Purity is tightly bunched: the middle 80% of results sit within 1.7 points. Measured content spreads across 27 points of the label.

HPLC purity
98.09–99.81%middle 80% of results
median 99.41%75% at 99% or higher5 under 98%
% HPLC purity
Measured content vs label
99–126%middle 80% of results
median 106%1 under 90%11 over 120%
% of the labelled amount
outside the usual rangeEndotoxin reported on 11 of 64 (17%)Confirmed on the lab's own portal: 19 (30%)Most tested size: 5 mg (34), then 10 mg (18) and 2 mg (12)

Latest Oxytocin tests

10 most recent · all formsAll 64 ↓
Latest Oxytocin lab tests
TestedShopLabPurityMeasured vs labelEndotoxinRecord
Peptide HackersAccumark Labs98.14%2.13 / 2 mg 106% of label—AM20260925-21✓
Humatide PeptidesILS Laboratories99.86%5.29 / 5 mg 106% of label—H5OXY073126
BioEdge Research LabsKovera Labs99.64%11.25 / 10 mg 113% of labelPass05122025OXY10✓
Glow AminosILS Laboratories99.78%5.31 / 5 mg 106% of label—GL-010194✓
Glow AminosILS Laboratories99.64%5.32 / 5 mg 106% of label—GL-010163✓
Elevated PeptidesMZ Biolabs97.38%not reported—2026-06-22
Ascension PeptidesKovera Labs99.65%2.44 / 2 mg 122% of labelPass26-05260628✓
24Peptidesliquilabs96.10%2.24 / 2 mg 112% of labelPassGF-OXY2-B241
Peptide Plugsfreedomdiagnosticstesting.com99.71%9.31 / 10 mg 93% of label—129-01-L✓
PepGenics Researchfreedomdiagnosticstesting.com99.30%5.03 / 5 mg 101% of label—OT5042026✓
98% or higher95–98%90–95%under 90%✓ found on the lab's own portalHover an endotoxin chip for the lab's exact wording

Results by lab

single vials · labs with the most Oxytocin tests
Oxytocin single-vial results by testing lab
LabTestsMedian purityMedian measured vs labelEndotoxin reportedConfirmed on lab portal
freedomdiagnosticstesting.com1999.32%118%610
BioRegen999.82%105%10
Janoshik Labs999.01%108%03
Vanguard Laboratory598.83%103%00
ILS Laboratories499.71%106%03
Bioviridian399.80%100%00
Chromate398.67%101%00
MZ Biolabs398.52%—00
Differences reflect the vials each lab received and how it reports — this is not a ranking of labs. Every lab with a Oxytocin test on file is linked under More on Oxytocin.

What the Oxytocin record shows

Oxytocin's record holds 64 certificates from 48 shops, tested by 14 labs between October 2024 and October 2026. Reported HPLC purity ran from 95.45% to 99.93% (median 99.41%). Measured content ran from 88% to 199% of the label (median 106%); 1 vial came in under 90%. 34 of the 64 vials were labelled 5 mg. 11 certificates include an endotoxin result, and 19 were confirmed on the lab's own portal.

Generated from the table below · updates with every new certificate

Every published Oxytocin test

64 · newest first
64 records, most recent first.
TestedShopLabPurityMeasured vs labelEndotoxinRecord
Peptide HackersAccumark Labs98.14%2.13 / 2 mg 106% of label—AM20260925-21✓
Humatide PeptidesILS Laboratories99.86%5.29 / 5 mg 106% of label—H5OXY073126
BioEdge Research LabsKovera Labs99.64%11.25 / 10 mg 113% of labelPass05122025OXY10✓
Glow AminosILS Laboratories99.78%5.31 / 5 mg 106% of label—GL-010194✓
Glow AminosILS Laboratories99.64%5.32 / 5 mg 106% of label—GL-010163✓
Elevated PeptidesMZ Biolabs97.38%not reported—2026-06-22
Ascension PeptidesKovera Labs99.65%2.44 / 2 mg 122% of labelPass26-05260628✓
24Peptidesliquilabs96.10%2.24 / 2 mg 112% of labelPassGF-OXY2-B241
Peptide Plugsfreedomdiagnosticstesting.com99.71%9.31 / 10 mg 93% of label—129-01-L✓
PepGenics Researchfreedomdiagnosticstesting.com99.30%5.03 / 5 mg 101% of label—OT5042026✓
Peptide Mindsfreedomdiagnosticstesting.com99.41%13.31 / 10 mg 133% of labelPassPMINDS632614✓
Warrior MakersTestides99.06%10.9 / 10 mg 109% of labelPass11260-SG5O
Offline Peptidesfreedomdiagnosticstesting.com99.68%7.15 / 5 mg 143% of label—OP-OT5-0526✓
Protide Healthfreedomdiagnosticstesting.com99.36%11.61 / 10 mg 116% of labelPassPH-oxy10-0125
KOLD PeptidesAccumark Labs95.45%5.11 / 5 mg 102% of label—9010
Precisely PeptidesVanguard Laboratory99.27%4.99 / 5 mg 100% of label—PP412-26-001
Warrior MakersMZ Biolabs99.47%not reported—11260-SG50
Oneday CompoundsILS Laboratories99.38%5.31 / 5 mg 106% of label—OC-OXY5-102✓
RC PeptidesJanoshik Labs96.63%10.77 / 10 mg 108% of label—010
Molecular Solutions Peptidesfreedomdiagnosticstesting.com99.12%4.64 / 5 mg 93% of labelPassR260416-OT5-W001✓
Enhanced PeptidesVanguard Laboratory99.50%5.15 / 5 mg 103% of label—OX26-0212
Pure Health PeptidesBioRegen99.40%5.06 / 5 mg 101% of label—SYN-022626
Pure Health PeptidesBioRegen99.42%9.96 / 10 mg 100% of label—SYN-022626
Amino USAfreedomdiagnosticstesting.com99.24%5.1 / 5 mg 102% of label—26OXY5-0006
Real Peptidesfreedomdiagnosticstesting.com99.75%7.18 / 5 mg 144% of labelPassView record →
Disguised AlphaChromate98.67%5.03 / 5 mg 101% of label—33621
Disguised AlphaChromate98.67%5.03 / 5 mg 101% of label—View record →
Peptide ProsBioviridian99.90%5 / 5 mg 100% of label—OXY-031626
Profound AminosJanoshik Labs98.70%5.96 / 5 mg 119% of label—View record →
Amino ForgeHorizon Analytical99.41%4.79 / 5 mg 96% of label—A-4275312
Luvion Bio Peptidesfreedomdiagnosticstesting.com99.32%2.37 / 2 mg 119% of label—LBL-0226-OT2-1036
PeptideTechfreedomdiagnosticstesting.com99.18%5.92 / 5 mg 118% of labelPassOSO-9845✓
Modern Research Peptidesfreedomdiagnosticstesting.com99.67%2 / 2 mg 100% of label—HKBCOT226✓
EZ PeptidesJanoshik Labs99.45%10.78 / 10 mg 108% of label—EZP-OXY1002092026-01✓
Ameano PeptidesJanoshik Labs99.49%10.65 / 10 mg 107% of label—OXY1002092026-01✓
Rivn Peptidesfreedomdiagnosticstesting.com99.04%5.84 / 5 mg 117% of label—7810
Glow Aminosfreedomdiagnosticstesting.com99.15%6.26 / 5 mg 125% of labelPassGL-010025✓
EZ Pepsfreedomdiagnosticstesting.com99.43%6.9 / 5 mg 138% of label—26-M1-BST/OT50101✓
Cosmic PeptidesBioviridian99.60%2.13 / 2 mg 107% of label—26068
Atomik LabzBioRegen99.78%5.09 / 5 mg 102% of labelPass0X01212026
Cosmic PeptidesBioviridian99.80%9.89 / 10 mg 99% of label—26071
Liberty PeptidesHorizon Analytical99.42%10.81 / 10 mg 108% of label—LPUS22254
National Science Labsfreedomdiagnosticstesting.com99.27%not reported—View record →
RUO.bioJanoshik Labs99.01%4.38 / 5 mg 88% of label—View record →
Protide Healthfreedomdiagnosticstesting.com99.58%15.16 / 10 mg 152% of labelCheck label—View record →
Blue Sky PeptideMZ Biolabs98.52%not reported—1UQOX0126
Ion Peptidefreedomdiagnosticstesting.com99.28%2.07 / 2 mg 103% of label—OT2-123125
KtechpeptideJanoshik Labs98.05%12.47 / 10 mg 125% of label—2025-12✓
Ion Peptidefreedomdiagnosticstesting.com99.48%2.3 / 2 mg 115% of label—OT2-121925
Beyond PeptidesJanoshik Labs95.47%11.89 / 10 mg 119% of label—002
XL PeptidesJanoshik Labs99.01%2.18 / 2 mg 109% of label—554107
BioLongevity LabsBioRegen99.93%10.46 / 10 mg 105% of label—22-3-45952
Amino USABioRegen99.82%5.24 / 5 mg 105% of label—25OXY5-0005
BioLongevity LabsMDx BioAnalytical Laboratory99.80%10.11 / 10 mg 101% of label—View record →
Trusted PeptidesBioRegen99.92%4.88 / 5 mg 98% of label—View record →
Pure Health PeptidesBioRegen99.89%5.6 / 5 mg 112% of label—TUY-101025
Ion Peptidefreedomdiagnosticstesting.com98.07%3.98 / 2 mg 199% of labelCheck label—OT2-1025
Peptide CraftersVanguard Laboratory98.83%5.27 / 5 mg 105% of label—PC-J1-OXT
Amino USABioRegen99.83%6.02 / 5 mg 120% of label—25OXY5-0004
BioLongevity LabsBioRegen99.51%12.39 / 10 mg 124% of label—View record →
Modern AminosChromate98.30%5.14 / 5 mg 103% of label—View record →
Kimera ChemsVanguard Laboratory98.75%5.1 / 5 mg 102% of label—View record →
Peptide CraftersJanoshik Labs99.60%1.83 / 2 mg 92% of label—View record →
Kimera ChemsVanguard Laboratory98.82%5.65 / 5 mg 113% of label—View record →

Measured amount in amber when it is under 90% or over 130% of the label; Check label when it is under 80% or over 150%. Records without a lot number link as View →.

Seven checks for any Oxytocin certificate

  1. Batch-matched and independent. The certificate names the lot in your hands and comes from a lab the vendor neither owns nor pays.
  2. Purity against the range. Read the figure against what other certificates for this compound report. How to read HPLC and mass-spec results
  3. Mass-spec identity. Only mass spectrometry shows which molecule is in the vial.
  4. Net content, measured. Purity and quantity are separate questions. Why 10 mg isn't 10 mg
  5. Endotoxin on the batch. A missing line means not tested, not passed. Endotoxin testing and LAL interpretation
  6. A lab you can check. Named on the certificate, with a way to verify it. Testing labs we track · Red flags in a certificate of analysis
  7. What no test shows. A clean certificate says nothing about efficacy, dosing or long-term safety.

More on Oxytocin

Labs with Oxytocin tests on file (14): Accumark Labs, ILS Laboratories, Kovera Labs, MZ Biolabs, liquilabs, freedomdiagnosticstesting.com, Testides, Vanguard Laboratory, Janoshik Labs, BioRegen, Chromate, Bioviridian, Horizon Analytical, MDx BioAnalytical Laboratory