Overall findings
Most lab-test failures
Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
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2001 Summit Labs Canada Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2023-02-23Latest test date3+ years COA history Fewer than 5 applicable tests 0 4
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2002 NeoSupps Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2021-04-16Latest test date5+ years 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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2003 Rewix Labs Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2020-07-24Latest test date6+ years COA history Fewer than 5 applicable tests 0 4
Lab evidence
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2166 Sennuo Community Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-12Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2118 Sunshine Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-10Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
Lab evidence
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2143 Peptide Resource Center / PRC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-08Latest 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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2167 Lunivo Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-06Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2168 Guangdong Tyran Technology Group Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-05Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2169 Wellness Research Supply Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-05Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2170 Zhongkechu Peptide Linyi Biotech Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-01Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2144 Johnny 5 Peptide Group Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-30Latest test date< 1 year COA history Fewer than 5 applicable tests 1 2
Lab evidence
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2171 Chenhao Biohealth Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-30Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2145 Encompass Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-29Latest 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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2146 Genea Wellness Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-27Latest 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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2147 PepDaddy Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-27Latest 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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2172 Aodt Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-25Latest 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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2173 Pai Chemicals Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-25Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2174 Peptide Boost Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-25Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2175 Viva Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-25Latest 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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2148 Raina's Summit, LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-24Latest 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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2176 Pristine Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-24Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2119 California Peptide Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-19Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
Lab evidence
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2149 RC Laboratories Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-16Latest 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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2177 Anhui Tengrun Import And Export Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-16Latest 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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2120 Alchemy Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-15Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2121 Sentinel Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-15Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2178 M Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-15Latest 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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2122 VerPoint, LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-11Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2150 Paradigm Medical Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-10Latest 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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2179 Hongke Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-09Latest 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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2180 Bizpeptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-08Latest 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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2181 Guangzhou Hongmenghan Trading Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-07Latest 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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2182 Soren Sciences Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-05Latest 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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2151 Vermax Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-03Latest 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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2152 Athena Health & Wellness LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-01Latest 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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2183 Cartman Gear Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-31Latest 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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2184 Longevity Plan Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-31Latest 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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2123 Aminex Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-30Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2153 TOMCAT PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-29Latest 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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2154 Pulsar Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-28Latest test date< 1 year COA history Fewer than 5 applicable tests 1 2
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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2124 Peppy Path Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
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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2004 Anchored Aminos Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-26Latest 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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2125 Dark Matter Bio Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-25Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
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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2126 Next Phase Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-25Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2155 Lynk Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-25Latest 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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2156 TUEME MED LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-24Latest test date< 1 year COA history Fewer than 5 applicable tests 1 2
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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2157 Banana Peppers LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-21Latest test date< 1 year COA history Fewer than 5 applicable tests 1 2
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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2185 Sinopep Zhengzhou Nuotai Bio Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-18Latest 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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2127 Golden State Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-14Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2186 Tranmoo Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-06Latest 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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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.