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Most lab-test failures
Vendors with the most tested samples showing at least one problem.
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2663 Peptides Bayou Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
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2664 Universe Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
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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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2844 Pepta Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 0 1
Lab evidence
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2665 CaliPeppers.com Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-24Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2666 Peptide Supps Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-24Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2667 Alpha Bound Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-18Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2668 Junli - Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-18Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2669 Needham Realty Group Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-18Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2670 Purveyor Wellness Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-18Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2671 GP Research Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-17Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2672 Journey Peptides GFC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-17Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2673 McAlpine Corporation Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-17Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2674 PeptoBuy LLC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2675 RTPeptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2676 Sanova Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2677 Vantage Aminos Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2678 Viking Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2679 ML II Research Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-14Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2680 OWL Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-12Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2681 KKRT Research Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-11Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2682 Pepa's Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-11Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2683 Cellupep website: cellupep.com Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-09Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2684 ol Plaza Family Medicine / Affordable Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-09Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2685 ALLISON PEPS Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-08Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2686 Riptide Science Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-08Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2687 Pepe&Co. NYGB Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-07Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2688 Alethia Research Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-05Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2689 FinleySystems LLC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-05Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2690 Klow Labs Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-05Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2691 QC-2026-4 Group Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-04Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2692 USPeptideGroup Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-04Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2693 Peptideware Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-05-01Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2694 Athena Wellness Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-30Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2695 Shanghai LeadPeptide Biotechnology Co., LTD. Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-30Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2696 ItsAMeMario2023 - Project Clear Gear Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-27Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2697 Peptide USA Express Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-26Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2698 Donato Wellness Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2699 Eterna Smart Wellness Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2700 Heron Health Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2701 Peps Only Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2702 PuraHelix Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2703 Rock Compound, LLC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2704 DoughBoy Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2705 Peptix labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2706 Rejuvenate Wellness - BGS Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2707 RWS Express, LLC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2708 ZJ Biolab Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2845 Looktide Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 0 1
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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2709 Exsilio International, LLC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-22Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2710 FBP Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-04-22Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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
- 120,993
- Ranked vendors across all seller groups
- 3,071
- 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 · 7,704 unique reports · 19 observed in 30 days
- Compare manufacturers, exporters and other international sellers by their independent lab reports.
- Domestic resellers
- 102 reviewed vendors · 17,264 unique reports · 41 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
- 2,939 vendors · 57,121 unique reports · 363 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 2026-10-20. 24 measured results have no usable date.
Domestic resellers: Recorded lab dates 2020-01-31 to 2026-10-22. 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 vendors1,779 measured results11.2–100% purity in 1,714 results Domestic resellers2,067 measured results33.7–100% purity in 1,915 results TirzepatideLab results by vendor↗ International vendors1,282 measured results40.4–100% purity in 1,248 results Domestic resellers1,436 measured results55.9–100% purity in 1,332 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 vendors400 measured results12.7–100% purity in 380 results Domestic resellers582 measured results48.94–99.99% purity in 525 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.