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ForumApex Peptides and the North Sioux City search: what's confirmed and what buyers can check· Shop talk · last reply 2 h ago
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Testagen lab tests

22 certificates of analysis for Testagen are on file, from 17 shops and 8 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
22
all single vials
Median purity
99.77%
usual 99.16–99.90% · shop COAs
Measured vs label
102%
median · 1 under 90% · 2 over 120%
Latest test
8 labs · 17 shops
Look up your vial's lot →Testagen prices →Testagen calculatorGet a vial tested

What Testagen results look like

single vials only · 22 purity results · 22 measured-content results

Purity is tightly bunched: the middle 80% of results sit within 0.7 points. Measured content spreads across 20 points of the label.

HPLC purity
99.16–99.90%middle 80% of results
median 99.77%100% at 99% or higher0 under 98%
% HPLC purity
Measured content vs label
97–117%middle 80% of results
median 102%1 under 90%2 over 120%
% of the labelled amount
outside the usual rangeEndotoxin reported on 8 of 22 (36%)Confirmed on the lab's own portal: 8 (36%)Most tested size: 20 mg (18)

Results by lab

single vials · labs with the most Testagen tests
Testagen single-vial results by testing lab
LabTestsMedian purityMedian measured vs labelEndotoxin reportedConfirmed on lab portal
freedomdiagnosticstesting.com1099.55%100%46
Janoshik Labs499.77%100%00
Differences reflect the vials each lab received and how it reports — this is not a ranking of labs. Every lab with a Testagen test on file is linked under More on Testagen.

What the Testagen record shows

Testagen's record holds 22 certificates from 17 shops, tested by 8 labs between April 2025 and August 2026. Reported HPLC purity ran from 99.14% to 99.94% (median 99.77%). Measured content ran from 84% to 130% of the label (median 102%); 1 vial came in under 90%. 18 of the 22 vials were labelled 20 mg. 8 certificates include an endotoxin result, and 8 were confirmed on the lab's own portal. freedomdiagnosticstesting.com ran 10 of the 22 tests.

Generated from the table below · updates with every new certificate

Every published Testagen test

22 · newest first
22 records, most recent first.
TestedShopLabPurityMeasured vs labelEndotoxinRecord
Peptide Plugsfreedomdiagnosticstesting.com99.94%23.35 / 20 mg 117% of labelPass104-GRN-BR✓
BioEdge Research LabsKovera Labs99.85%22.43 / 20 mg 112% of labelPass04012026TES20✓
American PeptidesBioviridian99.90%20.32 / 20 mg 102% of labelPassTESTA20-0528
PurgoLabs Peptidesfreedomdiagnosticstesting.com99.52%19.48 / 20 mg 97% of label—PL-01-TEST20✓
Core PeptidesVanguard Laboratory99.80%20 / 20 mg 100% of label—C73747✓
PeptideTechfreedomdiagnosticstesting.com99.80%18.62 / 20 mg 93% of label—TSG-8475✓
Verified PeptidesJanoshik Labs99.79%23.01 / 23 mg 100% of label—TST04260220B
TydesJanoshik Labs99.75%50.08 / 50 mg 100% of label—TGN50031726
Glacier AminosKovera Labs99.88%21.39 / 20 mg 107% of labelPassTST20GA-02
PeptideTechfreedomdiagnosticstesting.com99.58%20.92 / 20 mg 105% of labelPassTSG-8470✓
Amino Techfreedomdiagnosticstesting.com99.15%19.95 / 20 mg 100% of label—View record →
Grey Market Peptidefreedomdiagnosticstesting.com99.15%19.95 / 20 mg 100% of label—View record →
LA Peptidesfreedomdiagnosticstesting.com99.46%19.56 / 20 mg 98% of label—618✓
BioLongevity LabsBioRegen99.83%26.05 / 20 mg 130% of label—43-3-46035
Nova Peptide Supplyfreedomdiagnosticstesting.com99.14%10.98 / 10 mg 110% of labelPass2601290275
Liberty PeptidesHorizon Analytical99.21%21.84 / 20 mg 109% of label—LPUS020017
BioLongevity LabsMDx BioAnalytical Laboratory99.71%20.28 / 20 mg 101% of labelPassView record →
Iron Peptidesfreedomdiagnosticstesting.com99.74%16.84 / 20 mg 84% of label—View record →
Glacier Aminosfreedomdiagnosticstesting.com99.90%24.62 / 20 mg 123% of labelPassTST20GA01
BioLongevity LabsMDx BioAnalytical Laboratory99.80%20.44 / 20 mg 102% of label—View record →
Verified PeptidesJanoshik Labs99.75%21.72 / 22 mg 99% of label—09-25-0120A
Royal PeptidesJanoshik Labs99.83%22.85 / 20 mg 114% 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 Testagen 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.
Want a vial tested yourself? How to send a peptide for independent HPLC testing →

Related lab tests

More on Testagen

Testagen — compound profilewhat it is, shops, purityTestagen prices$/mg across lab-tested shopsTestagen calculatorreconstitution and unitsCOA benchmarkswhat shop COAs show and leave outGet a peptide testedlabs, prices, what to orderCheck your viallook up a lot number

Labs with Testagen tests on file (8): freedomdiagnosticstesting.com, Kovera Labs, Bioviridian, Vanguard Laboratory, Janoshik Labs, BioRegen, Horizon Analytical, MDx BioAnalytical Laboratory