Overall findings
Most lab-test failures
Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
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2564 Apex Labs, Seller Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-24Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
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2565 Beltrix Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-24Latest 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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2566 D&L Butts Team Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-24Latest 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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2567 FitFuel Peptide Co. Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-24Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2568 Lydia Pep Supply Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-24Latest 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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2569 Pacific Aminos Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-24Latest 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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2570 Sead Peps Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-24Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2571 T&J Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-24Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2572 Coastal Peptide Research Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2573 Enhanced Aminos LLC / Muscle pump26 Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2574 Enhanced Aminos LLC / Muscle pump28 Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2575 Enhanced Aminos LLC / Muscle pump30 Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2576 Enhanced Aminos LLC / Muscle pump31 Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-23Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2577 Enhanced Aminos LLC / Muscle pump33 Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-23Latest 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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2578 Enhanced Aminos LLC / Muscle pump34 Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-23Latest 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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2579 Crest Peptides / www.crestpep.com Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-22Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2580 Evole Wellness OC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-22Latest 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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2581 Jitai Trading Firm Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-22Latest 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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2582 Pepe Supply Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-22Latest 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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2583 Luxor Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-21Latest 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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2584 Novanix Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-21Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2585 PeptiBushLabs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-21Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2586 Sapien Research Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-21Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2587 AvoPep Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-20Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2588 Clinical Research Labs - cp Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-20Latest test date< 1 year COA history Fewer than 5 applicable tests 1 0
Lab evidence
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2589 Serene Glo Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-20Latest 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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2590 NUTRENI MALAYSIA Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-19Latest 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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2591 3 Iron Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-18Latest 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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2592 A2Z Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-18Latest 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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2593 Horizon Peptide Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-18Latest 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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2594 20+ Year Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-17Latest 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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2595 A.D.S Aminos Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-17Latest 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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2596 Frenchi Bench Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-17Latest 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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2597 Performance Peptides Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-17Latest 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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2598 Pulse RX Pulse Research Expansion Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-17Latest 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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2599 Serum Research Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-17Latest 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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2600 Xi'an Taiye Chemical Co. (XTP) Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-17Latest 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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2601 Nanjing Peptide Biotech Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-15Latest 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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2602 SolPeptide by SolXGenix.com Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-15Latest 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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2603 The Hood Marketplace Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-15Latest 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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2604 Mokemei Biotechnology (MKM) Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-14Latest 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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2605 Rentals Radar Inc. Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-14Latest 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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2606 NOVA BRIDGE CO Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-13Latest 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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2607 PepLeCute LLC Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-13Latest 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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2608 Armadillo Biologics Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-12Latest 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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2609 Habibi Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-12Latest 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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2610 HP Labs - PTB Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-12Latest 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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2611 Kurabi Peps Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-12Latest 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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2612 Neon Labs Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-12Latest 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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2613 Optiform Research Explore test results Seller type not reviewed No buyer reviews indexed 1Unique reports 2026-06-12Latest 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
- 121,000
- 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.