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Most lab-test failures
Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
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1750 8 Research Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-03-07Latest test date< 1 year COA history 0% low purity 4 1
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1720 Mobile Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-03-06Latest test date< 1 year COA history 0% low purity 5 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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1721 Glo Lab Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-23Latest test date< 1 year COA history 0% low purity 5 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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1722 Project Clear Gear Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-19Latest test date1+ year COA history Fewer than 5 applicable tests 5 0
Lab evidence
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1723 Advanced Research Network/ARN Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-17Latest test date< 1 year COA history 0% low purity 5 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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1797 Freedom Health Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-12Latest test date< 1 year COA history Fewer than 5 applicable tests 0 5
Lab evidence
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1724 Elevate Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-11Latest test date1+ year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1782 YC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-11Latest test date1+ year COA history 17% underdosed0% low purity 1 4
Lab evidence
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1725 Nova Lab Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-09Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1726 Test My Peptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-09Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1727 Alpha Peptide Technologies Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-02-07Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1728 Aureon Bioscience Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-01-11Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1751 QingFuji Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-01-07Latest test date< 1 year COA history 0% low purity 4 1
Lab evidence
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1798 www.europa-peptide.com Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-01-06Latest test date< 1 year COA history 20% underdosed 0 5
Lab evidence
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1729 CJCP Peptide Pharm, LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-01-05Latest test date< 1 year COA history 0% low purity 5 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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1730 Qingdao Vitaconin International Trading Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-12-29Latest test date1+ year COA history 20% low purity 5 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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1731 Premier Research Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-12-24Latest test date< 1 year COA history 0% low purity 5 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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1732 DYOR Wellness Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-12-13Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1799 Anglo peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-12-12Latest test date< 1 year COA history Fewer than 5 applicable tests 0 5
Lab evidence
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1733 ToggleShift LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-12-01Latest test date< 1 year COA history 20% underdosed0% low purity 5 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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1734 ChainLynx Aminos Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-11-29Latest test date< 1 year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1735 Terzeph Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-11-06Latest test date1+ year COA history 0% low purity 5 0
Lab evidence
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1800 Biaxol Supplements Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-10-14Latest test date1+ year COA history Fewer than 5 applicable tests 0 5
Lab evidence
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1736 Shandong Nuoweiou Medical Technology Co Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-10-09Latest test date1+ year COA history 0% low purity 5 0
Lab evidence
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1737 Pristine Biohack Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-10-02Latest test date1+ year COA history 0% low purity 5 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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1801 vyzelab.com Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-09-29Latest test date1+ year COA history 0% underdosed0% low purity 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1738 Purified Aminos Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-09-25Latest test date1+ year COA history Fewer than 5 applicable tests 5 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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1783 ALM Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-09-04Latest test date1+ year COA history 11% underdosed0% low purity 1 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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1802 Nova China Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-08-05Latest test date1+ year COA history Fewer than 5 applicable tests 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1739 The Mad Scientist Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-07-14Latest test date1+ year COA history 0% low purity 5 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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1803 XENO LABS Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-06-30Latest test date3+ years COA history Fewer than 5 applicable tests 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1804 Zhuoyan lab Peptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-06-16Latest test date1+ year COA history 0% underdosed0% low purity 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1805 Biogynx Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-06-13Latest test date2+ years COA history 0% underdosed40% low purity 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1806 ACR Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-06-11Latest test date1+ year COA history 0% underdosed0% low purity 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1807 BENELUX PHARMA Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2025-06-09Latest test date4+ years COA history Fewer than 5 applicable tests 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1808 Strate Labs Canada Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2024-12-02Latest test date5+ years COA history Fewer than 5 applicable tests 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1740 Modawhale Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2024-11-11Latest test date1+ year COA history 0% underdosed 5 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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1752 Deus Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2024-08-16Latest test date3+ years COA history Fewer than 5 applicable tests 4 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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1809 ROHM Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2023-08-11Latest test date3+ years COA history Fewer than 5 applicable tests 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1810 Buddha Pharma Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2023-06-27Latest test date3+ years COA history Fewer than 5 applicable tests 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1811 FORZA PHARMA (forzapharma.it) Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2023-04-15Latest test date3+ years COA history Fewer than 5 applicable tests 0 5
Lab evidence
Free previewExplore this vendor’s lab reports
Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1812 Nakon Medical Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2022-07-29Latest test date4+ years COA history Fewer than 5 applicable tests 0 5
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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1962 Anhui Tengrun Import And Export Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-10-27Latest test date< 1 year COA history Fewer than 5 applicable tests 0 4
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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1929 Ryz3 Research Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-10-17Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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1905 Corevia Labs Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-10-15Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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1930 ERP Peptides Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-10-15Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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1963 Golden Age Peptide Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-10-15Latest test date< 1 year COA history Fewer than 5 applicable tests 0 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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1964 Sediao Chemical Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-10-12Latest test date< 1 year COA history Fewer than 5 applicable tests 0 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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1906 peptide bro's Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-10-10Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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1965 Shenzhen Qiyoukai Trading Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-10-08Latest test date< 1 year COA history Fewer than 5 applicable tests 0 4
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
- 121,165
- 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 · 57,179 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.