Overall findings
Most lab-test failures
Vendors with the most tested samples showing at least one problem.
Investigate 3,073 peptide vendors.
Review testing histories, buyer reports and recorded concerns in one directory.
605 LabRat Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-10-21Latest test date< 1 year COA history 0% underdosed0% low purity 6 19
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609 Hong Kong Meiliduo Technology Limited Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-10-15Latest test date< 1 year COA history 10% low purity 0 25
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596 Noble Dragons Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-10-12Latest test date< 1 year COA history 0% low purity 20 5
Lab evidence
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604 Excalibur Peptides Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-10-09Latest test date< 1 year COA history 0% underdosed0% low purity 7 18
Lab evidence
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600 Bear Chemical, LLC Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-10-07Latest test date< 1 year COA history 0% underdosed0% low purity 13 12
Lab evidence
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606 Tannic Lab Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-09-19Latest test date< 1 year COA history 0% underdosed0% low purity 6 19
Lab evidence
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599 Bio-Xcell Peptides Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-09-16Latest test date< 1 year COA history 0% underdosed8% low purity 14 11
Lab evidence
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608 Tp Peptide Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-09-16Latest test date< 1 year COA history 17% underdosed4% low purity 4 21
Lab evidence
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603 Hexis Research Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-09-13Latest test date< 1 year COA history 0% underdosed0% low purity 8 17
Lab evidence
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597 Essential Amino Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-09-12Latest test date< 1 year COA history 0% underdosed0% low purity 18 7
Lab evidence
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602 Zova Labs Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-09-11Latest test date< 1 year COA history 0% underdosed0% low purity 10 15
Lab evidence
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601 Guardian Labs Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-07-20Latest test date< 1 year COA history 6% underdosed0% low purity 13 12
Lab evidence
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593 Peptology USA Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-07-17Latest test date< 1 year COA history 4% underdosed0% low purity 22 3
Lab evidence
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598 Verra Labs LLC Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-07-11Latest test date< 1 year COA history 10% underdosed0% low purity 16 9
Lab evidence
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595 DutchLabs Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-07-01Latest test date1+ year COA history Fewer than 5 applicable tests 21 4
Lab evidence
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594 Arka Longevity Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-06-12Latest test date< 1 year COA history 0% underdosed0% low purity 22 3
Lab evidence
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607 Akro Research Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-05-31Latest test date< 1 year COA history 10% underdosed0% low purity 6 19
Lab evidence
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586 Fire Peptides Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-05-20Latest test date1+ year COA history 10% underdosed0% low purity 25 0
Lab evidence
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587 Kairos Research Labs Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-04-25Latest test date< 1 year COA history 0% low purity 25 0
Lab evidence
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588 MMAEK251 Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-04-14Latest test date< 1 year COA history 8% underdosed7% low purity 25 0
Lab evidence
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610 Panda Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-03-11Latest test date< 1 year COA history 16% underdosed13% low purity 0 25
Lab evidence
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589 Element Biolabs Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-01-31Latest test date< 1 year COA history 4% low purity 25 0
Lab evidence
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590 Bioforge Peptides Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-01-26Latest test date< 1 year COA history 10% underdosed4% low purity 25 0
Lab evidence
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591 Bio Bulk Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2025-11-24Latest test date< 1 year COA history 16% underdosed8% low purity 25 0
Lab evidence
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592 Research Grade Peptides Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2025-11-05Latest test date< 1 year COA history 0% underdosed4% low purity 25 0
Lab evidence
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611 Driada Medical Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2022-03-31Latest test date4+ years COA history Fewer than 5 applicable tests 0 25
Lab evidence
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639 Steady Meds Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-10-27Latest test date< 1 year COA history 0% low purity 12 12
Lab evidence
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635 Riptide Labs Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-10-14Latest test date< 1 year COA history 5% underdosed0% low purity 14 10
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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86 Bulk Peptide Wholesale Explore test results U.S. reseller No buyer reviews indexed 24Unique reports 2026-10-06Latest test date< 1 year COA history 4% low purity 20 4
Lab evidence
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636 AC Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-10-03Latest test date1+ year COA history 4% underdosed0% low purity 14 10
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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626 M Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-30Latest test date1+ year COA history 4% low purity 20 4
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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633 Evolve Wellness OC Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-30Latest test date< 1 year COA history 0% underdosed0% low purity 15 9
Lab evidence
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627 Retaone Labs Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-29Latest test date1+ year COA history 0% underdosed0% low purity 20 4
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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634 Elevar Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-29Latest test date< 1 year COA history 0% underdosed0% low purity 15 9
Lab evidence
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641 C2 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-29Latest test date< 1 year COA history 0% underdosed0% low purity 8 16
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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643 Prestige Men's Health Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-29Latest test date< 1 year COA history 6% underdosed0% low purity 5 19
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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637 ZOLVIR LLC Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-28Latest test date< 1 year COA history 5% underdosed0% low purity 14 10
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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628 SUPG Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-26Latest test date< 1 year COA history 0% underdosed0% low purity 20 4
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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642 HTX Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-22Latest test date< 1 year COA history 0% underdosed0% low purity 7 17
Lab evidence
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624 AURORA Explore test results Seller type not reviewed 7 buyer reviews 24Unique reports 2026-09-16Latest test date< 1 year COA history 0% underdosed0% low purity 23 1
Lab evidence
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638 Phoenix Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-06Latest test date< 1 year COA history 0% underdosed4% low purity 13 11
Lab evidence
Free previewExplore this vendor’s lab reports
Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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629 BioGlow Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-08-08Latest test date< 1 year COA history 0% underdosed4% low purity 19 5
Lab evidence
Free previewExplore this vendor’s lab reports
Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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630 SNDCartel Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-08-01Latest test date< 1 year COA history 0% underdosed0% low purity 19 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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640 Max Ventures LTD (PEP LAUNCHPAD) Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-07-17Latest test date< 1 year COA history 0% underdosed0% low purity 11 13
Lab evidence
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625 Uwa Elite Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-07-01Latest test date1+ year COA history 0% low purity1 endotoxin failure 22 2
Lab evidence
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612 Parasyn Labs Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-06-24Latest test date< 1 year COA history 4% underdosed0% low purity 24 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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613 Genxell Bio Pharmaceutical Explore test results Seller type not reviewed 371 buyer reviews 24Unique reports 2026-06-23Latest test date< 1 year COA history 0% low purity 24 0
Lab evidence
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614 Peptides4Lyfe Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-06-21Latest test date< 1 year COA history 10% underdosed0% low purity 24 0
Lab evidence
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632 Next Level Labs - BGS Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-05-01Latest test date< 1 year COA history 0% underdosed0% low purity 16 8
Lab evidence
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615 Vylix Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-04-21Latest test date< 1 year COA history 11% underdosed4% low purity 24 0
Lab evidence
Free previewExplore this vendor’s lab reports
Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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More reports means more evidence to inspect, not better quality. Each report counts once. Purity and amount percentages require at least five applicable results; explicit endotoxin failures are always shown. Missing measurements are not passes.
Understand the coverage
- Published COA report entries
- 121,392
- Ranked vendors across all seller groups
- 3,073
- Index refresh
Report dates are shown with each test. International classification does not establish factory ownership. U.S. resale does not establish U.S. manufacture.
The first 20 identities in each seller group’s original report-count ranking are shown to signed-in members. Changing the sort order does not change access. Vendors ranked 21 and below in those rankings remain named.
- International vendors
- 30 reviewed vendors · 7,735 unique reports · 18 observed in 30 days
- Compare manufacturers, exporters and other international sellers by their independent lab reports.
- Domestic resellers
- 102 reviewed vendors · 17,086 unique reports · 43 observed in 30 days
- Compare U.S.-based resellers. The seller is domestic; the product may still come from an overseas supplier.
- Seller type not reviewed
- 2,941 vendors · 57,323 unique reports · 339 observed in 30 days
- Sellers with independent lab reports whose seller type we have not reviewed yet.
Each report counts once, even when it tests several compounds or appears in multiple archives. Purity and dose results describe submitted samples, not everything a vendor sells. The methodology and known limitations explain eligibility and exclusions.
Explore recorded findings and compound comparisons
What is a domestic reseller?
A reseller buys from another supplier and sells under its own storefront or brand. Here, domestic means U.S.-based. Local shipping does not mean the product was made in the U.S. or tested after resale. Check the report for the actual batch.
Follow the evidence
Where the tests went wrong.
Recorded failures alongside the number of applicable tests. Choose a seller group to see the results behind each count.
Contamination findings
Failed endotoxin tests
Compare repeated failures in tests for bacterial endotoxins.
Below 97% purity
Low purity results
Vendors with the most measured purity results below 97%.
At least 10% short
Underfilled samples
See where tests found less compound than the stated amount.
Identity findings
Compound not found
Vendors with the most results that did not find the labeled compound.
What these counts include
All available results in the lab-findings comparisons. Each category counts only applicable tests; missing measurements do not count as passes. One sample can appear in several categories, but counts once in the overall total. These are counts of tested samples, not failure rates for everything a vendor sells.
International vendors: Recorded lab dates 2022-06-24 to 2026-10-27. 24 measured results have no usable date.
Domestic resellers: Recorded lab dates 2020-01-31 to 2026-10-27. 143 measured results have no usable date.
Choose your compound
Compare lab results
by compound.
Explore measured results, compare vendors and open their lab reports. These figures cover the same reviewed seller groups as the findings above.
GLP-1 and related compounds
RetatrutideLab results by vendor↗ International vendors1,792 measured results11.2–100% purity in 1,726 results Domestic resellers2,026 measured results33.7–100% purity in 1,878 results TirzepatideLab results by vendor↗ International vendors1,288 measured results40.4–100% purity in 1,254 results Domestic resellers1,394 measured results55.9–100% purity in 1,291 resultsGrowth hormone and related compounds
HGHLab results by vendor↗ International vendors79 measured results90.45–99.9% purity in 76 results Domestic resellers9 measured results96.14–99.84% purity in 9 results TesamorelinLab results by vendor↗ International vendors403 measured results12.7–100% purity in 383 results Domestic resellers572 measured results48.94–99.99% purity in 515 resultsRanges include measured purity above 0%. “Compound not found” is counted separately. The report library has broader coverage; vendor rankings apply their own minimum test counts.
Beyond the lab
What was it like to order?
Buyer reviews cover delivery, communication and service. Each keeps its date and source.