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.
819 Bopeptide Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-10-20Latest test date1+ year COA history 6% low purity 8 10
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
826 Pride Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-10-15Latest test date< 1 year COA history 7% underdosed0% low purity 4 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.
820 Bio Jacked Supplements Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-10-13Latest test date< 1 year COA history 15% underdosed0% low purity 8 10
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.
817 Alamo Research Labs LLC Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-10-10Latest test date< 1 year COA history 0% underdosed0% low purity 9 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.
829 Vixenova Labs Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-10-10Latest test date< 1 year COA history 25% underdosed0% low purity 2 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.
823 Tristar Peptides Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-10-03Latest test date< 1 year COA history 0% underdosed0% low purity 6 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.
815 Advantogen Labs LLC Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-09-26Latest test date1+ year COA history 0% underdosed0% low purity 12 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.
824 Avenio Bio LLC Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-09-26Latest test date< 1 year COA history 6% underdosed0% low purity 5 13
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.
818 Liyu Daily Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-09-24Latest test date1+ year COA history 14% underdosed6% low purity 9 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.
821 Lisa Levy Living Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-09-05Latest test date< 1 year COA history 0% underdosed0% low purity 8 10
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.
827 Hardnox Research Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-09-05Latest test date< 1 year COA history 0% underdosed0% low purity 4 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.
830 ENDLESS LONGEVITY RESEARCH Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-09-03Latest test date< 1 year COA history 0% underdosed0% low purity 1 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.
828 GROPPI AMERICAN PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-09-01Latest test date< 1 year COA history 0% low purity 3 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.
825 GLOW Research Society Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-08-30Latest test date< 1 year COA history 20% underdosed0% low purity 5 13
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.
822 TNN Enterprises Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-08-28Latest test date< 1 year COA history 0% underdosed6% low purity 8 10
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.
811 Healthtide Biotech Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-08-25Latest test date1+ year COA history 11% low purity 15 3
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.
814 Nulife Peptides Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-08-12Latest test date< 1 year COA history 0% low purity 14 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.
812 Direct Vision, LLC Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-08-06Latest test date1+ year COA history 8% underdosed0% low purity 15 3
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.
808 Huatai Peptides Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-07-31Latest test date< 1 year COA history 7% underdosed0% low purity 17 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.
809 Titan Peptide Research Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-07-18Latest test date< 1 year COA history 0% underdosed0% low purity 17 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.
810 Venom Lab Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-07-10Latest test date< 1 year COA history Fewer than 5 applicable tests 17 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.
799 SYNRG Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-06-25Latest test date< 1 year COA history 6% underdosed0% low purity 18 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.
800 A.R.N./Advanced Research Network Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-06-21Latest test date< 1 year COA history 0% underdosed0% low purity 18 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.
816 Kensington labs Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-05-25Latest test date1+ year COA history 12% underdosed8% low purity 12 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.
801 Paradigm Peptide Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-04-30Latest test date1+ year COA history 0% low purity 18 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.
802 Intevera Health Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-01-18Latest test date1+ year COA history 0% underdosed0% low purity 18 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.
803 BioThrive Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2026-01-13Latest test date< 1 year COA history 7% underdosed0% low purity 18 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.
804 Science Of Longevity Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2025-12-17Latest test date< 1 year COA history 7% low purity 18 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.
805 Peptide Department Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2025-12-12Latest test date< 1 year COA history 0% underdosed0% low purity 18 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.
832 opengatelabs.com Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2025-12-02Latest test date1+ year COA history Fewer than 5 applicable tests 0 18
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.
833 Kensingtonlabs.co.uk Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2025-11-14Latest test date1+ year COA history 0% underdosed0% low purity 0 18
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.
806 Helix Reagents LLC Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2025-10-21Latest test date1+ year COA history 0% underdosed0% low purity 18 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.
807 Redmondpharmacy Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2024-10-17Latest test date2+ years COA history 0% underdosed 18 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.
834 Generopharm - Kits4Less.com Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2024-09-26Latest test date2+ years COA history 25% underdosed 0 18
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.
835 BIAXOL LTD Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2024-08-16Latest test date4+ years COA history 0% underdosed 0 18
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.
836 AUSJUICE / AUSMEDS Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2023-10-11Latest test date3+ years COA history Fewer than 5 applicable tests 0 18
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.
837 Crowx Labs Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2023-05-10Latest test date4+ years COA history 80% low purity 0 18
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.
838 DEUS MEDICAL (INDIA) Explore test results Seller type not reviewed No buyer reviews indexed 18Unique reports 2020-01-28Latest test date7+ years COA history 0% underdosed 0 18
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.
851 Pepessentials.com Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-09-28Latest test date< 1 year COA history 7% underdosed0% low purity 15 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.
Read the evidence behind the summary.
Open vendor profile
Check the original reports, dates and tested batches.
861 Precision Aminos Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-09-25Latest test date< 1 year COA history 0% underdosed0% low purity 11 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.
864 Aura Farms Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-09-25Latest test date< 1 year COA history 0% underdosed0% low purity 9 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.
863 Dalian Handom Chemicals Hdc Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-09-19Latest test date1+ year COA history 7% low purity 10 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.
868 www.peptidosnova.com Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-09-15Latest test date< 1 year COA history 0% underdosed0% low purity 5 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.
867 Apogee Peptides, LLC Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-09-08Latest test date< 1 year COA history 6% underdosed0% low purity 7 10
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.
869 BGS Research Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-08-30Latest test date< 1 year COA history 0% underdosed0% low purity 4 13
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.
858 Bennasere Wellness Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-08-17Latest test date< 1 year COA history 0% underdosed0% low purity 12 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.
856 Qianmiao Peptide Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-08-12Latest test date< 1 year COA history 0% low purity 13 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.
859 Aurora Aminos Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-08-12Latest test date< 1 year COA history 8% underdosed0% low purity 12 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.
862 Biostacked Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-08-09Latest test date< 1 year COA history 6% underdosed0% low purity 11 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.
865 The Peptide Collective Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-08-06Latest test date< 1 year COA history 0% underdosed0% low purity 8 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.
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
- 121,045
- 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.