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.
1516 Benson Group, LLC Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-26Latest test date< 1 year COA history 0% low purity 4 3
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1553 Tech Wave Peptides Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-24Latest test date< 1 year COA history 0% low purity 0 7
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1544 KASH'S PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-22Latest test date< 1 year COA history 0% underdosed0% low purity 1 6
Lab evidence
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1554 Apollo Peptide Sciences Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-20Latest test date< 1 year COA history 0% low purity 0 7
Lab evidence
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1555 Yh Peptide Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-19Latest test date< 1 year COA history 0% low purity 0 7
Lab evidence
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1556 Bff Chem Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-17Latest test date< 1 year COA history 0% low purity 0 7
Lab evidence
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1534 SECURE PEPTIDE SOLUTIONS Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-16Latest test date< 1 year COA history 0% underdosed0% low purity 2 5
Lab evidence
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1503 Spartan Research Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-15Latest test date< 1 year COA history 0% underdosed0% low purity 6 1
Lab evidence
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1557 Yingyou Daily Chemical Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-15Latest test date< 1 year COA history 0% low purity 0 7
Lab evidence
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1535 Youthful Aminos Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-11Latest test date< 1 year COA history 0% underdosed0% low purity 2 5
Lab evidence
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1508 QualiTrust USA Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-04Latest test date< 1 year COA history Fewer than 5 applicable tests 5 2
Lab evidence
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1509 Emerald Biotech Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-09-02Latest test date< 1 year COA history 14% underdosed0% low purity 5 2
Lab evidence
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1517 Elevated Biologics LLC Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-31Latest test date< 1 year COA history 0% underdosed0% low purity 4 3
Lab evidence
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1536 MaximumPeps Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-30Latest test date< 1 year COA history 0% underdosed0% low purity 2 5
Lab evidence
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1537 HK Compounds Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-25Latest test date< 1 year COA history 0% underdosed0% low purity 2 5
Lab evidence
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1504 htraresearch.cn Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-24Latest test date< 1 year COA history 0% underdosed0% low purity 6 1
Lab evidence
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1505 LX Research Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-23Latest test date< 1 year COA history 0% underdosed0% low purity 6 1
Lab evidence
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1538 MidMo Peptides Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-23Latest test date< 1 year COA history 0% underdosed0% low purity 2 5
Lab evidence
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1558 Blessed Peptides Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-18Latest test date< 1 year COA history 0% low purity 0 7
Lab evidence
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1518 The Pure Lab Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-13Latest test date< 1 year COA history 0% underdosed0% low purity 4 3
Lab evidence
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1506 LJ — Hong Kong Lejian Biotechnology Explore test results Seller type not reviewed 280 buyer reviews 7Unique reports 2026-08-12Latest test date< 1 year COA history 14% low purity 6 1
Lab evidence
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1510 SQS SUBQ SCIENTIST Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-12Latest test date< 1 year COA history 0% underdosed0% low purity 5 2
Lab evidence
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1511 GRAYED Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-04Latest test date< 1 year COA history 0% low purity 5 2
Lab evidence
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1519 South Florida BioResearch Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-04Latest test date< 1 year COA history 0% low purity 4 3
Lab evidence
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1539 Purix Peptides Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-08-01Latest test date< 1 year COA history 0% underdosed0% low purity 2 5
Lab evidence
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1528 Peps Mart Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-30Latest test date< 1 year COA history 0% underdosed0% low purity 3 4
Lab evidence
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1540 Purity Chain Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-30Latest test date< 1 year COA history 0% low purity 2 5
Lab evidence
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1520 Southwest Peptides Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-27Latest test date< 1 year COA history 0% underdosed0% low purity 4 3
Lab evidence
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1545 Elevate Biosystems Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-25Latest test date< 1 year COA history 0% underdosed0% low purity 1 6
Lab evidence
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1529 Utah Biolabs Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-15Latest test date< 1 year COA history 0% low purity 3 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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1507 Be Still Vitality LLC Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-12Latest test date< 1 year COA history 0% underdosed0% low purity 6 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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1512 Fast Peptide Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-04Latest test date< 1 year COA history 0% underdosed0% low purity 5 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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1513 Performance Aminos Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-04Latest test date< 1 year COA history 0% low purity 5 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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1462 Adonis40 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-01Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1463 SORA BIOLABS Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-07-01Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1464 Guangzhou Aoyu Trading Firm- Nina Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-25Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1465 Shenzhen Jiacheng Yifeng Technology Co., LTD. Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-25Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1466 Sola Peptide Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-25Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1467 UGlow Peptides Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-25Latest test date< 1 year COA history Fewer than 5 applicable tests 7 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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1468 Yun Qian Trading Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-25Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1469 Versatile Peptides Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-24Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1470 9th Wonder Research Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-22Latest test date< 1 year COA history 0% low purity 7 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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1471 Texas Peptide Resource Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-18Latest test date< 1 year COA history 14% underdosed0% low purity 7 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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1472 Biosyn Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-14Latest test date< 1 year COA history 0% low purity 7 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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1473 Modern Apotheca (Changsha Xijun) Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-13Latest test date< 1 year COA history 0% underdosed0% low purity 7 0
Lab evidence
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1474 Pure Peptide Supplier Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-13Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1475 Revive Research Company Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-06-12Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1514 Physique Peptides Wellness Group Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-05-25Latest test date1+ year COA history 0% low purity 5 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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1476 Echelon Labs Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-05-23Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1477 KLOW.Bio KLOW Labs LLC Explore test results Seller type not reviewed No buyer reviews indexed 7Unique reports 2026-05-20Latest test date< 1 year COA history 14% underdosed0% low purity 7 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
- 121,185
- 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 · 7,735 unique reports · 20 observed in 30 days
- Compare manufacturers, exporters and other international sellers by their independent lab reports.
- Domestic resellers
- 102 reviewed vendors · 17,278 unique reports · 44 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 · 57,178 unique reports · 353 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 resellers2,076 measured results33.7–100% purity in 1,924 results TirzepatideLab results by vendor↗ International vendors1,288 measured results40.4–100% purity in 1,254 results Domestic resellers1,438 measured results55.9–100% purity in 1,334 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 resellers583 measured results48.94–99.99% purity in 526 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.