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.
949 M.A.D. Amino Research Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-06-18Latest test date< 1 year COA history 0% underdosed0% low purity 12 3
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928 Quorvex Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-06-15Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
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944 Olympic Peptide Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-06-11Latest test date1+ year COA history 17% underdosed8% low purity 14 1
Lab evidence
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929 Endura Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-28Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
Lab evidence
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954 Summit Wellness Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-23Latest test date< 1 year COA history 0% underdosed0% low purity 11 4
Lab evidence
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959 Phoenix Biolabs Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-22Latest test date1+ year COA history 0% low purity 9 6
Lab evidence
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946 Clinical Peptides Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-21Latest test date< 1 year COA history 0% underdosed0% low purity 13 2
Lab evidence
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930 UAE Peptide Lab Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-16Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
Lab evidence
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960 Peptyx Labs Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-09Latest test date< 1 year COA history 0% underdosed0% low purity 9 6
Lab evidence
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931 PetBiologix Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-08Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
Lab evidence
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974 High Tide Compounds Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-08Latest test date< 1 year COA history 8% underdosed0% low purity 4 11
Lab evidence
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932 Nuway Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-05-04Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
Lab evidence
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933 Pure Tested Peptides Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-04-28Latest test date1+ year COA history 25% underdosed18% low purity 15 0
Lab evidence
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934 APR Health Solutions Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-04-26Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
Lab evidence
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964 RENU Wellness LLC Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-04-22Latest test date< 1 year COA history 0% low purity 8 7
Lab evidence
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965 New Era Peptides Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-04-19Latest test date< 1 year COA history 0% underdosed0% low purity 8 7
Lab evidence
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935 Bioryx Labs Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-04-15Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
Lab evidence
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950 Shilai Peptide Technologies Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-03-30Latest test date1+ year COA history 0% underdosed0% low purity 12 3
Lab evidence
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947 Brava Longevity Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-02-27Latest test date< 1 year COA history 0% underdosed0% low purity 13 2
Lab evidence
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961 SNP Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-02-26Latest test date1+ year COA history 0% underdosed0% low purity 9 6
Lab evidence
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936 Iron Within Nutrition LLC Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-02-22Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
Lab evidence
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951 Sj Peptides Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-01-26Latest test date2+ years COA history 8% low purity 12 3
Lab evidence
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937 Peak Peptides Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2026-01-13Latest test date1+ year COA history 18% underdosed0% low purity 15 0
Lab evidence
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938 Felix Chem LLC Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2025-12-31Latest test date< 1 year COA history 0% underdosed0% low purity 15 0
Lab evidence
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955 Amino Alchemy Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2025-12-02Latest test date1+ year COA history Fewer than 5 applicable tests 11 4
Lab evidence
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939 NOVA Peptide Supply Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2025-11-22Latest test date< 1 year COA history 7% underdosed0% low purity 15 0
Lab evidence
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940 Furongpeptide Explore test results Seller type not reviewed 3 buyer reviews 15Unique reports 2025-11-19Latest test date< 1 year COA history 0% low purity 15 0
Lab evidence
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980 TRS Research Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2025-08-11Latest test date2+ years COA history 7% underdosed0% low purity 0 15
Lab evidence
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945 RoidTeam.net Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2025-07-08Latest test date3+ years COA history 0% underdosed 14 1
Lab evidence
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941 OmegaAmino Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2025-06-05Latest test date1+ year COA history 0% underdosed7% low purity 15 0
Lab evidence
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981 pure-platinum.com Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2024-12-04Latest test date2+ years COA history 0% underdosed 0 15
Lab evidence
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982 onlythebestaaas.com Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2024-03-28Latest test date6+ years COA history 25% underdosed 0 15
Lab evidence
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983 Bio-Active Labs Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2023-06-16Latest test date3+ years COA history Fewer than 5 applicable tests 0 15
Lab evidence
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984 ZEROX Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2023-06-09Latest test date4+ years COA history 0% underdosed 0 15
Lab evidence
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985 Biosira ltd, India Explore test results Seller type not reviewed No buyer reviews indexed 15Unique reports 2020-08-29Latest test date6+ years COA history 0% underdosed 0 15
Lab evidence
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1023 Retatrutidelog.com Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-10-17Latest test date< 1 year COA history 0% low purity 5 9
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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1033 Papi Peps Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-10-17Latest test date< 1 year COA history 20% underdosed0% low purity 2 12
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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1019 MAssGen X Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-10-10Latest test date< 1 year COA history 0% underdosed0% low purity 8 6
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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1020 Pacific Revival Labs Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-10-10Latest test date< 1 year COA history 0% underdosed0% low purity 8 6
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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1009 CyberLabz Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-10-06Latest test date< 1 year COA history 0% underdosed0% low purity 13 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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1029 Bay Area Compounds Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-29Latest test date< 1 year COA history 0% underdosed0% low purity 3 11
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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1034 Pep - Test Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-26Latest test date< 1 year COA history 0% underdosed0% low purity 2 12
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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1013 Pepclub Usa Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-24Latest test date< 1 year COA history 0% underdosed0% low purity 12 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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1021 Lux Synth Aminos Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-24Latest test date< 1 year COA history 8% low purity 8 6
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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1037 Peptidejft Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-24Latest test date1+ year COA history 0% low purity 0 14
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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1022 ZLZ Peptides Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-21Latest test date1+ year COA history 17% underdosed0% low purity 6 8
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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1030 Peptide Plug Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-16Latest test date< 1 year COA history 0% underdosed0% low purity 3 11
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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1038 Go Alpha Labs Peptides Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-15Latest test date< 1 year COA history 8% low purity 0 14
Lab evidence
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1024 Woosh Labs Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-10Latest test date< 1 year COA history 8% underdosed0% low purity 5 9
Lab evidence
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1026 CoreBio Peptides Explore test results Seller type not reviewed No buyer reviews indexed 14Unique reports 2026-09-09Latest test date< 1 year COA history 9% underdosed0% low purity 4 10
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
- 121,054
- 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.