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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1053 Ech3lon Vector Labs Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-05-03Latest test date< 1 year COA history 0% underdosed0% low purity 13 0
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1079 PureForm Peptides Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-04-30Latest test date1+ year COA history 0% underdosed0% low purity 8 5
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1081 Miss Peptides Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-04-19Latest test date< 1 year COA history 0% underdosed0% low purity 6 7
Lab evidence
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1054 Blue Atlas Biologics Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-03-26Latest test date< 1 year COA history 0% underdosed0% low purity 13 0
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1072 Guardian Metabolics Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-03-25Latest test date< 1 year COA history 0% underdosed0% low purity 10 3
Lab evidence
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1073 Sierra Peptides Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-03-19Latest test date< 1 year COA history 0% underdosed0% low purity 10 3
Lab evidence
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1055 Vial Vibes Only Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-02-16Latest test date< 1 year COA history 0% low purity 13 0
Lab evidence
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1056 Prime Scientific Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-02-09Latest test date1+ year COA history 10% underdosed8% low purity 13 0
Lab evidence
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1057 Bulk Nutrition Group Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2026-01-15Latest test date< 1 year COA history 0% underdosed0% low purity 13 0
Lab evidence
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1058 Nutrastrips (1) Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-12-20Latest test date< 1 year COA history 0% low purity 13 0
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1090 Peptide Dynamics Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-11-27Latest test date< 1 year COA history 20% underdosed12% low purity 0 13
Lab evidence
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1091 cellpept.eu Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-11-14Latest test date1+ year COA history 8% underdosed0% low purity 0 13
Lab evidence
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1092 COMPOUND PURITY Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-10-17Latest test date1+ year COA history 0% underdosed0% low purity 0 13
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1059 Lumora Peptides Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-10-11Latest test date1+ year COA history 0% underdosed0% low purity 13 0
Lab evidence
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1060 Peptlabs Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-10-03Latest test date1+ year COA history 0% underdosed0% low purity 13 0
Lab evidence
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1084 HPR Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-09-09Latest test date1+ year COA history 0% low purity 5 8
Lab evidence
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1088 Pacific Wave Peptides Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-08-26Latest test date2+ years COA history 0% underdosed0% low purity 2 11
Lab evidence
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1089 idenex.biz Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-06-03Latest test date2+ years COA history Fewer than 5 applicable tests 1 12
Lab evidence
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1093 www.ywaozuo.com Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-06-02Latest test date1+ year COA history 9% underdosed0% low purity 0 13
Lab evidence
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1094 Keifei Pharma Co., Ltd Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2025-03-21Latest test date1+ year COA history 20% underdosed 0 13
Lab evidence
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1095 ProPeptide Research Lab Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2024-12-11Latest test date2+ years COA history 46% underdosed0% low purity 0 13
Lab evidence
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1096 Pharmax Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2021-08-27Latest test date6+ years COA history Fewer than 5 applicable tests 0 13
Lab evidence
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1097 https://royallabindustries.com/ Explore test results Seller type not reviewed No buyer reviews indexed 13Unique reports 2020-02-08Latest test date6+ years COA history Fewer than 5 applicable tests 0 13
Lab evidence
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1148 Lumevex Research Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-10-16Latest test date< 1 year COA history 0% underdosed0% low purity 5 7
Lab evidence
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1158 Warrior Makers Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-10-12Latest test date< 1 year COA history 0% low purity 0 12
Lab evidence
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1151 Sam's Supplies Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-10-03Latest test date< 1 year COA history 10% underdosed0% low purity 3 9
Lab evidence
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1149 Epic Peptides Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-09-30Latest test date< 1 year COA history 0% underdosed0% low purity 5 7
Lab evidence
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1145 Bcryptic Research Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-09-24Latest test date< 1 year COA history 0% underdosed0% low purity 7 5
Lab evidence
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1137 Karma Peptides Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-09-13Latest test date< 1 year COA history 0% underdosed0% low purity 10 2
Lab evidence
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1152 ORDINIS Life Science Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-09-13Latest test date< 1 year COA history 0% underdosed0% low purity 3 9
Lab evidence
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1156 Peppin' Ain't Easy / P.A.E. Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-09-04Latest test date< 1 year COA history 0% underdosed0% low purity 1 11
Lab evidence
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1138 First Due Biotech Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-09-03Latest test date< 1 year COA history 0% underdosed0% low purity 10 2
Lab evidence
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1153 The Research Protocol Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-09-01Latest test date< 1 year COA history 0% underdosed0% low purity 3 9
Lab evidence
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1159 Pda Pharma Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-08-27Latest test date1+ year COA history 0% underdosed0% low purity 0 12
Lab evidence
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1098 Reverse Peptide Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-08-23Latest test date< 1 year COA history 0% low purity 12 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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1143 Elite RX Labs Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-08-23Latest test date< 1 year COA history 0% underdosed0% low purity 8 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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1135 Northstar Research Labs Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-08-09Latest test date< 1 year COA history 18% underdosed0% low purity 11 1
Lab evidence
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1160 Pink Girl Peps Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-08-06Latest test date< 1 year COA history Fewer than 5 applicable tests 0 12
Lab evidence
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1099 HHB — HongKong Himalaya Biotechnology Explore test results Seller type not reviewed 206 buyer reviews 12Unique reports 2026-07-22Latest test date< 1 year COA history 0% underdosed0% low purity 12 0
Lab evidence
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1154 Theratide USA Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-07-15Latest test date< 1 year COA history 0% low purity 2 10
Lab evidence
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1157 Excel Aminos Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-07-15Latest test date< 1 year COA history 0% underdosed0% low purity 1 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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1144 AminoWave Labs Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-07-11Latest test date< 1 year COA history 0% underdosed0% low purity 8 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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1150 Bohemia Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-07-09Latest test date< 1 year COA history 14% underdosed17% low purity 5 7
Lab evidence
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1155 Aztec Peptides Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-07-08Latest test date< 1 year COA history 0% underdosed0% low purity 2 10
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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1146 ModernMed Solutions Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-06-24Latest test date< 1 year COA history 0% underdosed0% low purity 7 5
Lab evidence
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1139 Biohack London Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-06-23Latest test date< 1 year COA history 0% low purity 10 2
Lab evidence
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1100 Aminos Peptides Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-06-21Latest test date1+ year COA history 0% underdosed0% low purity 12 0
Lab evidence
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1101 Peppertidez LLC Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-06-21Latest test date< 1 year COA history 20% underdosed0% low purity 12 0
Lab evidence
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1147 Vulcan Peptides Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-06-17Latest test date< 1 year COA history 9% underdosed0% low purity 7 5
Lab evidence
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1102 e Lab Research IPNH www.lifelabresearch.com Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-06-12Latest test date< 1 year COA history 0% underdosed0% low purity 12 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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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.