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.
1747 BioLooks.com Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-22Latest test date< 1 year COA history 20% underdosed0% low purity 4 1
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1795 Kangshengda Technology Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-22Latest test date< 1 year COA history Fewer than 5 applicable tests 0 5
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1748 TrioTide Research Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-20Latest test date< 1 year COA history 0% low purity 4 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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1796 Syhth Peptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-20Latest test date< 1 year COA history Fewer than 5 applicable tests 0 5
Lab evidence
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1760 Velthra Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-19Latest test date< 1 year COA history 0% low purity 3 2
Lab evidence
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1761 Easy Peps Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-16Latest test date< 1 year COA history 0% low purity 3 2
Lab evidence
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1780 Kerui Peptide HongKong Co., Ltd (KR) Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-02Latest test date< 1 year COA history 0% low purity 1 4
Lab evidence
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1682 GT Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-01Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1762 Longevity Pro's Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-01Latest test date< 1 year COA history Fewer than 5 applicable tests 3 2
Lab evidence
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1683 Midwest Compounds Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-29Latest test date< 1 year COA history 0% low purity 5 0
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1763 Pentech Pharma Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-29Latest test date1+ year COA history Fewer than 5 applicable tests 3 2
Lab evidence
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1684 True Test Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-28Latest test date< 1 year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1685 Kraken Research Labs, LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-27Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1686 Novacore Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-27Latest test date1+ year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1687 Go Vial Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-26Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1688 BioHax Labz Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-25Latest test date< 1 year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1689 Lumen Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-21Latest test date< 1 year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1690 REGENEX Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-20Latest test date< 1 year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1691 Nebula Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-18Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1749 Immortal Peptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-18Latest test date< 1 year COA history 0% low purity 4 1
Lab evidence
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1764 Prime Peptides (primepeptides.co) Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-17Latest test date2+ years COA history Fewer than 5 applicable tests 3 2
Lab evidence
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1692 Amino Axis Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-15Latest test date< 1 year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1693 Mohawk Life Science Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-13Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1694 Flight Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-12Latest test date< 1 year COA history 0% underdosed0% low purity 5 0
Lab evidence
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1695 PHIT-PharmX Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-12Latest test date< 1 year COA history 0% low purity 5 0
Lab evidence
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1696 Ow6133612 Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-11Latest test date1+ year COA history 0% low purity 5 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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1697 Technology Co., Ltd.) Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-07Latest test date< 1 year COA history 20% underdosed0% low purity 5 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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1698 LabX Peptides Canada | labxpeptides.io Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-04Latest test date< 1 year COA history 0% low purity 5 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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1699 Peptide & Co. Research Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-02Latest test date< 1 year COA history 0% underdosed0% low purity 5 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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1700 Peak HelixLabs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-01Latest test date< 1 year COA history 0% low purity 5 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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1701 Secra Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-06-01Latest test date< 1 year COA history 0% low purity 5 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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1702 PepSynLabs LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-05-29Latest test date< 1 year COA history Fewer than 5 applicable tests 5 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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1703 S.V. Kings Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-05-27Latest test date< 1 year COA history 0% underdosed0% low purity 5 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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1704 Brasignal Research LLC. Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-05-24Latest test date< 1 year COA history 0% low purity 5 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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1705 yonglibiopeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-05-05Latest test date< 1 year COA history 0% low purity 5 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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1706 BioBetaLabs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-05-03Latest test date< 1 year COA history 0% low purity 5 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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1707 BGS Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-05-01Latest test date< 1 year COA history 0% low purity 5 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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1708 Pinecrest Peptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 5 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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1709 Helix Haus Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-04-16Latest test date< 1 year COA history 0% low purity 5 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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1710 Super Peps LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-04-09Latest test date< 1 year COA history 0% low purity 5 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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1711 Setting the Bar / Independent Peptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-04-08Latest test date< 1 year COA history 0% underdosed0% low purity 5 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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1712 E613 Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-04-03Latest test date< 1 year COA history 0% low purity 5 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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1713 Ridgeline Resources Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-04-03Latest test date< 1 year COA history 0% low purity 5 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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1714 911 Peptide LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-04-01Latest test date< 1 year COA history 0% underdosed0% low purity 5 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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1715 Independent Peptide/Setting the Bar Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-04-01Latest test date< 1 year COA history 0% low purity 5 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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1781 AB Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-03-27Latest test date< 1 year COA history 0% low purity 1 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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1716 Amino Reset Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-03-24Latest test date< 1 year COA history 0% low purity 5 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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1717 Empire Eight LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-03-18Latest test date< 1 year COA history 0% low purity 5 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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1718 Pharaoh Pharmal Peps Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-03-18Latest test date< 1 year COA history Fewer than 5 applicable tests 5 0
Lab evidence
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1719 Shanghai Huahaige Plastic Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-03-10Latest test date< 1 year COA history 0% low purity 5 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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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.