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.
1374 Foundation Aminos, Inc. Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-09-10Latest test date< 1 year COA history 0% underdosed0% low purity 1 8
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1348 PepGeekz Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-09-06Latest test date< 1 year COA history 0% low purity 6 3
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1367 TrueSpec Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-09-03Latest test date< 1 year COA history 0% underdosed0% low purity 2 7
Lab evidence
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1375 Prestige Aminos Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-09-03Latest test date< 1 year COA history 0% underdosed0% low purity 1 8
Lab evidence
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1349 Forerunner Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-09-01Latest test date< 1 year COA history 12% underdosed0% low purity 6 3
Lab evidence
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1343 Peptide Central Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-08-30Latest test date< 1 year COA history 60% underdosed 7 2
Lab evidence
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1363 Flourish Global Peptide Explore test results Seller type not reviewed 2 buyer reviews 9Unique reports 2026-08-28Latest test date< 1 year COA history 0% low purity 3 6
Lab evidence
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1358 Solix Labs Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-08-17Latest test date< 1 year COA history 0% underdosed0% low purity 4 5
Lab evidence
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98 Artemyx Research Explore test results U.S. reseller No buyer reviews indexed 9Unique reports 2026-08-14Latest test date< 1 year COA history 0% underdosed0% low purity 7 2
Lab evidence
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1368 Energyze Labs Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-08-08Latest test date< 1 year COA history 0% underdosed0% low purity 2 7
Lab evidence
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1311 Alphex Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-08-03Latest test date1+ year COA history 12% underdosed12% low purity 9 0
Lab evidence
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1377 Emlin Bioscience Exchange Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-08-03Latest test date< 1 year COA history 0% low purity 0 9
Lab evidence
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1359 Zyren Research Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-07-30Latest test date< 1 year COA history 0% underdosed0% low purity 4 5
Lab evidence
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1312 hmmpeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-07-22Latest test date< 1 year COA history Fewer than 5 applicable tests 9 0
Lab evidence
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1341 Changan District Sheng Peptide Trading Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-07-22Latest test date1+ year COA history 0% low purity 8 1
Lab evidence
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1369 Reviva Search Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-07-12Latest test date< 1 year COA history 14% underdosed0% low purity 2 7
Lab evidence
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1344 Prime Pep Labs Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-07-08Latest test date1+ year COA history 11% underdosed11% low purity 7 2
Lab evidence
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1354 LNP Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-26Latest test date1+ year COA history 0% underdosed0% low purity1 endotoxin failure 5 4
Lab evidence
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1313 PepMarket LLC Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-23Latest test date< 1 year COA history 11% underdosed0% low purity 9 0
Lab evidence
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1314 Velocity Bio Labs Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-20Latest test date< 1 year COA history 0% underdosed0% low purity 9 0
Lab evidence
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1315 High Desert Sciences Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-18Latest test date< 1 year COA history 12% underdosed0% low purity 9 0
Lab evidence
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1316 VITAL TIDES RESEARCH LLC Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-18Latest test date< 1 year COA history 0% underdosed0% low purity 9 0
Lab evidence
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1317 Hydrolabs Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-17Latest test date< 1 year COA history 0% underdosed0% low purity 9 0
Lab evidence
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1376 XL Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-11Latest test date1+ year COA history 0% underdosed0% low purity 1 8
Lab evidence
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1318 Advatex Labs Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-10Latest test date< 1 year COA history 0% underdosed0% low purity 9 0
Lab evidence
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1319 TruSpec Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-07Latest test date< 1 year COA history 17% underdosed0% low purity 9 0
Lab evidence
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1320 Orange Market Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-05Latest test date< 1 year COA history 0% underdosed0% low purity 9 0
Lab evidence
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1321 QNTX Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-06-05Latest test date< 1 year COA history 11% underdosed0% low purity 9 0
Lab evidence
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1322 Ascension Aminos Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-28Latest test date< 1 year COA history 0% underdosed0% low purity 9 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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1323 Goddess Laboratory Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-27Latest test date< 1 year COA history 17% underdosed0% low purity 9 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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1324 Lit Bio Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-27Latest test date< 1 year COA history 33% underdosed0% low purity 9 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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1325 Sublime Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-25Latest test date1+ year COA history 0% underdosed0% low purity 9 0
Lab evidence
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1326 The Peptide Collective / TPC Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-21Latest test date< 1 year COA history 17% underdosed0% low purity 9 0
Lab evidence
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1327 G Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-16Latest test date< 1 year COA history 0% underdosed0% low purity 9 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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1328 PRIME AXIS LABS LLC Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-16Latest test date< 1 year COA history 0% underdosed0% low purity 9 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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1329 SuppliedPeps Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-16Latest test date< 1 year COA history 0% low purity 9 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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1342 Alimo Peptide Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-11Latest test date1+ year COA history 0% low purity 8 1
Lab evidence
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1350 Wuhan Newtop Biotech Co.,LTD Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-08Latest test date1+ year COA history 0% low purity 6 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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1330 OmegaPure Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-05-01Latest test date< 1 year COA history 0% underdosed0% low purity 9 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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1345 Tribal Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-04-30Latest test date< 1 year COA history 0% underdosed0% low purity 7 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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1331 Best Coast Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-04-28Latest test date< 1 year COA history 0% underdosed0% low purity 9 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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1370 Tested Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-04-18Latest test date1+ year COA history 0% underdosed0% low purity 2 7
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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1364 Vera Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-04-07Latest test date< 1 year COA history 0% underdosed0% low purity 3 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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1371 Pure Biotech Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-03-31Latest test date< 1 year COA history 0% underdosed0% low purity 2 7
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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1332 ShapeRx Peptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-03-29Latest test date< 1 year COA history 0% underdosed0% low purity 9 0
Lab evidence
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1333 FITSKINS Research Group Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-02-28Latest test date< 1 year COA history 0% low purity 9 0
Lab evidence
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1378 Basifu Technology Bsf Yoyo Peptide Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-02-18Latest test date1+ year COA history 0% low purity 0 9
Lab evidence
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1379 SubiePeptides Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-02-18Latest test date1+ year COA history 0% low purity 0 9
Lab evidence
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1351 CPB — Cyco Peptide Bio Cpb Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-02-15Latest test date< 1 year COA history 0% low purity 6 3
Lab evidence
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1334 SJP Explore test results Seller type not reviewed No buyer reviews indexed 9Unique reports 2026-02-09Latest test date< 1 year COA history 0% low purity 9 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
- 121,181
- 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.