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Most lab-test failures
Vendors with the most tested samples showing at least one problem.
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2064 Proper Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-20Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
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2209 Quzhou Kecheng Jitai Trading Firm Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-19Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
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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2065 PEPLIX Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-17Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2210 Huaian Banting Trading Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-13Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
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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2066 valhallashop.pro Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-12Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2162 Peptide Labworks Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-12Latest test date1+ year COA history Fewer than 5 applicable tests 1 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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2211 Alphaback Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-10Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2067 Perpetual Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-07Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2212 China Suyue Technology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-07Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2213 Lyra Biomeds Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-06Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2068 Better Life Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-05Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2069 UnionLabs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2214 Domestic Peps Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2215 Sigma Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2216 Xc Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2217 Xingtai Yingpeptide Technology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2070 Vici Biotech Corp Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-28Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2071 PepGeniX Biotechnology CO Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-26Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2163 Nexa Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-26Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2218 Zhengzhou Strong Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-26Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2219 Shandong Yixin Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-22Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
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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2220 Shenzhen Nuoao Technology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-18Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2072 Kaos Enterprise INC. Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-16Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2073 Nepatide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-14Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2074 Northarc Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-12Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2075 Appalachia Research Direct Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-11Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2076 Ittalas Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-09Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2077 LIVX Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-07Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2078 Intervera Health Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-05Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2079 MFN Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-05Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2080 Pharaoh Pharma / Fast Fit Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-05Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2081 Nutri Wave Lab Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-04Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2082 TX Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-29Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2221 Bexit Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-26Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2222 Peng Du Trading Limited Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-26Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2083 Isthmus Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-24Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2084 The Hill LTD Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-24Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2085 Setting The Bar/ Aesthetics + Wellness Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-18Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2086 MyRR Health & Beauty Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-17Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2223 Ignite Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-15Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2087 ULTRAx Health Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-12Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2224 Syntholan Technologies Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-12Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2088 Independent Research Group Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-01-09Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2089 Averis Labs LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-30Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2090 Pepsmith LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-25Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2225 NOUVEAUX Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-22Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2091 Claim Adjusters Inc Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-20Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2092 Atlan Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-16Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2093 Lydia-Peptide Supplier Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-13Latest test date1+ year COA history Fewer than 5 applicable tests 3 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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2226 Guangdong Huatai Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-11Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
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
- 121,052
- 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 · 17,263 unique reports · 38 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 · 57,120 unique reports · 344 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.