Overall findings
Most lab-test failures
Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
Review testing histories, buyer reports and recorded concerns in one directory.
2329 The Wellness Collective Co-Op Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-02Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
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2471 Hainan Flying Intl Trade Co. / Ron Denning Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-02Latest test date< 1 year COA history Fewer than 5 applicable tests 1 1
Lab evidence
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2330 Next Health Solutions Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-01Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2501 Peptide People Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-01Latest test date< 1 year COA history Fewer than 5 applicable tests 0 2
Lab evidence
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2331 ATXPeps Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-31Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2332 LN Peptide / Ron Denning Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-30Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2333 Bond, Peptide Bond, LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2334 Delta Research Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2335 Diaz Performance Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2336 JP Bio Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2337 M-Powered Marketing Solutions LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2338 PND Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2339 Waterstone Health Management Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2472 NextGen Research (NRX) Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 1 1
Lab evidence
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2340 Landmark Biotech Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-25Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2341 Helix Point Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-24Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2342 Taylor B. Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-24Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2343 True Aminos Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-24Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2344 VT Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-21Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2345 Kevin - Peps Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-18Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2346 GYUE BIOLOGICAL INDUSTRY COMPANY LIMITED Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2347 Marg/QingFuji Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2348 NrG Wellness Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2349 UE BIOLOGICAL INDUSTRY COMPANY LIMITED Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2350 Keystone Research Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-14Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2351 TruePoint Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-14Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2352 Badger Compounds Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-11Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2353 Vitro Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-11Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2354 Optimal Peptide Solutions Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-08Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2355 WBS Shanghai Wibson Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-08Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2356 Aura Cell Science, Rebel Lab, Aucus Pharma Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-04Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2357 One Chance Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-01Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2358 GordonPeps Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-30Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2359 OA LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-30Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2360 Peptide Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-30Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2361 Proof Peptides / Homopeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-29Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2502 Shanghai Chinqesen Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-28Latest test date< 1 year COA history Fewer than 5 applicable tests 0 2
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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2473 peptidesfactorycn.com Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-27Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2362 JM Trading Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2363 Qureshi Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2364 Surfside Aminos Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-25Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2365 PeptX Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2366 Andre Bosch LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-19Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2367 Chained Aminos - ER Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-19Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2368 Elevated Aminos Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-18Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2369 Lioncore, LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-18Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2370 AetherForge Health Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-15Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2371 Thrive Labz Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-15Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2372 Lexen Peptide Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2373 CKS Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-04-12Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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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
- 121,020
- 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.