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Vendors with the most tested samples showing at least one problem.
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1616 Hoyle Aminos Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2025-09-09Latest test date1+ year COA history 0% low purity 6 0
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1617 Biolabshop Limited Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2025-09-05Latest test date1+ year COA history 17% low purity 6 0
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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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1618 Parabolic Peptide Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2025-08-15Latest test date1+ year COA history 17% low purity 6 0
Lab evidence
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1676 exobutiken.com Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2025-04-09Latest test date2+ years COA history Fewer than 5 applicable tests 0 6
Lab evidence
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1677 AKRA LABS Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2025-03-13Latest test date3+ years COA history Fewer than 5 applicable tests 0 6
Lab evidence
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1619 Deux Labs Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2024-07-25Latest test date3+ years COA history Fewer than 5 applicable tests 6 0
Lab evidence
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1678 Syn Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2023-03-03Latest test date3+ years COA history Fewer than 5 applicable tests 0 6
Lab evidence
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1679 PharmaGen Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2023-02-09Latest test date3+ years COA history Fewer than 5 applicable tests 0 6
Lab evidence
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1620 Turkishpharmacysteroids Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2022-01-09Latest test date5+ years COA history Fewer than 5 applicable tests 6 0
Lab evidence
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1680 ONYX-PHARMA Explore test results Seller type not reviewed No buyer reviews indexed 6Unique reports 2021-10-02Latest test date5+ years COA history Fewer than 5 applicable tests 0 6
Lab evidence
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1784 Mgc Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-10-20Latest test date< 1 year COA history 0% low purity 0 5
Lab evidence
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1785 Yiwu Laizhi Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-10-16Latest test date< 1 year COA history 0% low purity 0 5
Lab evidence
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1786 Changsha Caoquan Technology Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-10-09Latest test date< 1 year COA history Fewer than 5 applicable tests 0 5
Lab evidence
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1765 BIOELEVATE Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-10-08Latest test date< 1 year COA history 0% low purity 2 3
Lab evidence
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1772 Bondedd.com Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-10-08Latest test date< 1 year COA history 0% low purity 1 4
Lab evidence
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1787 Hengan Peptide Factory Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-10-06Latest test date< 1 year COA history Fewer than 5 applicable tests 0 5
Lab evidence
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1788 Mjt Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-10-06Latest test date< 1 year COA history 0% low purity 0 5
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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1789 Tidetron Peptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-10-06Latest test date< 1 year COA history 20% low purity 0 5
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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1790 Pepturion Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-30Latest test date< 1 year COA history 0% low purity 0 5
Lab evidence
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1753 The Secret Beet Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-28Latest test date1+ year COA history 0% low purity 3 2
Lab evidence
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1741 Qingdao Meipeptide Technology Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-24Latest test date< 1 year COA history 0% low purity 4 1
Lab evidence
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1773 Peptide.Express Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-24Latest test date< 1 year COA history 0% underdosed0% low purity 1 4
Lab evidence
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1791 Peptide Factory Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-24Latest test date< 1 year COA history Fewer than 5 applicable tests 0 5
Lab evidence
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1774 Moonwell Apothecary Research Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-22Latest test date< 1 year COA history 0% underdosed0% low purity 1 4
Lab evidence
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1742 Renueva advanced Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-21Latest 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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1766 Bio Drift labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-21Latest test date< 1 year COA history 0% low purity 2 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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1743 Zhang Ty Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-19Latest test date1+ year COA history 20% 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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1767 Right Now Research-Evolution X Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-19Latest test date< 1 year COA history 0% underdosed0% low purity 2 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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1754 Keystone Total Health Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-14Latest test date< 1 year COA history 0% low purity 3 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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1768 Foreboding Solutions Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-13Latest test date< 1 year COA history 0% low purity 2 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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1755 Biohack Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-10Latest test date< 1 year COA history 0% low purity 3 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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1744 Yiwu Beigong Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-07Latest test date1+ year COA history Fewer than 5 applicable tests 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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1769 Amino Nerd Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-09-04Latest test date< 1 year COA history 0% low purity 2 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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1775 ULTIMATE RX Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-31Latest 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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1770 Biohacker Labz Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-30Latest test date< 1 year COA history 0% low purity 2 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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1681 SynthElite Research Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-23Latest 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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1745 Purity Tides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-22Latest test date< 1 year COA history Fewer than 5 applicable tests 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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1746 General Select Research Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-21Latest test date< 1 year COA history 0% underdosed0% 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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1776 Area 15 Labs Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-18Latest 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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1771 Alamo Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-17Latest test date< 1 year COA history 0% low purity 2 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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1792 Konors Peptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-12Latest test date< 1 year COA history 0% low purity 0 5
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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1756 Mons Mons & ElleWerks Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-11Latest test date< 1 year COA history 0% low purity 3 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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1757 J&J Research Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-09Latest test date< 1 year COA history 0% low purity 3 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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1793 Peptides Book Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-09Latest test date< 1 year COA history Fewer than 5 applicable tests 0 5
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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1794 Lotus Bio Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-03Latest test date< 1 year COA history 0% low purity 0 5
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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1777 Lipeptide Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-08-01Latest test date< 1 year COA history 0% underdosed0% 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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1758 SingleVials.com Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-31Latest test date< 1 year COA history 0% underdosed0% low purity 3 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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1778 BioCode USA LLC Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-31Latest 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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1759 Gametime Health Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-28Latest test date< 1 year COA history 0% low purity 3 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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1779 Journey Peptides Explore test results Seller type not reviewed No buyer reviews indexed 5Unique reports 2026-07-27Latest test date< 1 year COA history 0% low purity 1 4
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
- 121,172
- 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.