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.
751 Exogenics Lab Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-10-19Latest test date< 1 year COA history 0% underdosed0% low purity 12 8
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
See who these vendors are.Sign up with your email to see every vendor name in this directory. No payment needed. Pro adds original COAs, batch details and buyer reviews.Sign up to see names
Already have an account? Sign in
763 STX Research Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-10-15Latest test date< 1 year COA history 0% underdosed0% low purity 1 19
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
761 Protocol No.9 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-10-12Latest test date< 1 year COA history 0% underdosed0% low purity 6 14
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
742 Cryocore Performance Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-10-05Latest test date< 1 year COA history 7% underdosed0% low purity 15 5
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
756 Peptiatlas Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-10-01Latest test date1+ year COA history 17% underdosed6% low purity 9 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
764 Expert Peptide Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-30Latest test date< 1 year COA history 0% low purity 0 20
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
753 BlueStar Peptides Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-29Latest test date< 1 year COA history 0% underdosed0% low purity 11 9
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
757 Guangzhou Lengiuanhuang Cosmetics Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-24Latest test date< 1 year COA history 8% low purity 9 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
754 Tahoe Elite Research Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-18Latest test date< 1 year COA history 7% underdosed0% low purity 11 9
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
740 Pureveda Peptides Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-16Latest test date1+ year COA history 0% underdosed0% low purity 16 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
741 Amino-Me Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-15Latest test date< 1 year COA history 5% underdosed0% low purity 16 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
758 Native Peptides Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-10Latest test date< 1 year COA history 7% underdosed0% low purity 9 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
762 BetterBio Synthesis Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-10Latest test date< 1 year COA history 0% underdosed0% low purity 6 14
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
747 Elite Eons Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-09Latest test date< 1 year COA history 0% underdosed0% low purity 13 7
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
748 Alchemy Peptide Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-09-03Latest test date< 1 year COA history 0% underdosed0% low purity 13 7
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
759 C-Pep Research Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-08-13Latest test date< 1 year COA history 6% underdosed0% low purity 9 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
744 Truline Medical Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-08-12Latest test date< 1 year COA history 0% underdosed0% low purity 14 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
749 Hydra Pulse Research Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-08-06Latest test date< 1 year COA history 0% underdosed0% low purity 13 7
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
752 Peptidologix Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-07-21Latest test date< 1 year COA history 6% underdosed0% low purity 12 8
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
745 Peter Piper's Peppers Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-07-05Latest test date< 1 year COA history 0% underdosed0% low purity 14 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
755 Absolute Pep LLC Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-07-03Latest test date< 1 year COA history 37% underdosed10% low purity 11 9
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
760 Standard Peptide Factory Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-06-29Latest test date< 1 year COA history 0% underdosed0% low purity 8 12
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
750 Lasting bio Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-06-23Latest test date< 1 year COA history 6% underdosed0% low purity 13 7
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
743 UWA Biotech Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-06-17Latest test date1+ year COA history 8% underdosed0% low purity 15 5
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
732 Athens Peptides Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-06-12Latest test date< 1 year COA history 0% underdosed0% low purity 20 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
733 Nexmino LLC Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-06-08Latest test date< 1 year COA history 0% underdosed0% low purity 20 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
739 GNP Peptides Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-05-16Latest test date< 1 year COA history 13% underdosed0% low purity 19 1
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
734 Revived Biotech Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-05-05Latest test date< 1 year COA history 19% underdosed0% low purity 20 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
735 Amino Nation Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-02-03Latest test date< 1 year COA history 0% underdosed0% low purity 20 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
736 Optimal Bio Labs LLC Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-01-31Latest test date< 1 year COA history 7% underdosed0% low purity 20 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
737 Ultra Pure Peptides Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-01-31Latest test date< 1 year COA history 6% underdosed5% low purity 20 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
765 Peptide hubs Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2026-01-12Latest test date1+ year COA history 13% underdosed0% low purity 0 20
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
746 Hacker Peptides Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2025-12-27Latest test date1+ year COA history 0% underdosed0% low purity 14 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
738 BioAge Wellness LLC Explore test results Seller type not reviewed No buyer reviews indexed 20Unique reports 2025-11-21Latest test date< 1 year COA history 0% underdosed0% low purity 20 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
786 NOVUS Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-10-10Latest test date< 1 year COA history 20% underdosed0% low purity 7 12
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
794 Equitide Peptide Vitality Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-10-09Latest test date< 1 year COA history 6% underdosed0% low purity 3 16
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
780 EnergiX Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-10-06Latest test date< 1 year COA history 0% underdosed0% low purity 13 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
781 Summit Science Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-10-06Latest test date< 1 year COA history 0% underdosed0% low purity 13 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
796 Midwest Compounds - MWC Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-09-27Latest test date< 1 year COA history 7% underdosed0% low purity 2 17
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
784 Veratis Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-09-23Latest test date< 1 year COA history 0% underdosed0% low purity 11 8
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
793 Crestpeptide Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-09-21Latest test date1+ year COA history 0% low purity 4 15
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
90 Golden Eagle Explore test results U.S. reseller No buyer reviews indexed 19Unique reports 2026-09-13Latest test date1+ year COA history 0% low purity 18 1
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
792 Powercell labs Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-09-13Latest test date< 1 year COA history 0% underdosed0% low purity 5 14
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
787 Critical Peptides Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-08-30Latest test date< 1 year COA history 0% underdosed0% low purity 7 12
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
795 VAYN Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-08-30Latest test date1+ year COA history 0% underdosed0% low purity 3 16
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
774 Mongo Peptides Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-08-26Latest test date< 1 year COA history 0% underdosed0% low purity 15 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
766 JD BioWorks Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-08-19Latest test date< 1 year COA history 0% underdosed0% low purity 19 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
776 Elite Optimization Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-08-18Latest test date< 1 year COA history 6% underdosed0% low purity 14 5
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
788 EXPERT PEPTIDE/WWW.EXPERTPEPTIDE.COM Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-08-11Latest test date< 1 year COA history 0% underdosed0% low purity 7 12
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
789 Pured Research Explore test results Seller type not reviewed No buyer reviews indexed 19Unique reports 2026-08-04Latest test date< 1 year COA history 7% underdosed0% low purity 7 12
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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
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
- 121,035
- 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.