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.
441 UGL OZ Explore test results Seller type not reviewed No buyer reviews indexed 35Unique reports 2023-11-14Latest test date3+ years COA history 25% low purity 2 33
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
445 L3 Compounds Explore test results Seller type not reviewed No buyer reviews indexed 34Unique reports 2026-10-12Latest test date< 1 year COA history 14% underdosed0% low purity 17 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.
443 Super Peptides Explore test results Seller type not reviewed No buyer reviews indexed 34Unique reports 2026-10-06Latest test date< 1 year COA history 4% low purity 22 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.
447 Longevity WS Explore test results Seller type not reviewed No buyer reviews indexed 34Unique reports 2026-10-01Latest test date< 1 year COA history 4% underdosed4% low purity 8 26
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.
448 Permian Research Compounds Explore test results Seller type not reviewed No buyer reviews indexed 34Unique reports 2026-10-01Latest test date< 1 year COA history 0% underdosed0% low purity 6 28
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.
442 Haikou Mingheng Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 34Unique reports 2026-09-21Latest test date1+ year COA history 9% low purity 27 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.
446 ZJ Bio Labs Explore test results Seller type not reviewed No buyer reviews indexed 34Unique reports 2026-08-27Latest test date< 1 year COA history 0% underdosed0% low purity 15 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.
449 AF PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 34Unique reports 2026-08-18Latest test date< 1 year COA history 0% underdosed0% low purity 1 33
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.
444 LumaPeptides Explore test results Seller type not reviewed No buyer reviews indexed 34Unique reports 2026-08-08Latest test date1+ year COA history 0% underdosed0% low purity 21 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.
461 Retalux Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-10-16Latest test date< 1 year COA history 3% low purity 2 31
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.
460 Hyte Research Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-10-14Latest test date1+ year COA history 0% underdosed0% low purity 10 23
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.
459 Wicked Bio Peptides Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-10-10Latest test date< 1 year COA history 3% underdosed0% low purity 11 22
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.
457 Raider Peps Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-09-21Latest test date1+ year COA history 3% underdosed3% low purity 25 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.
458 Reju Peptides Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-09-01Latest test date< 1 year COA history 0% underdosed0% low purity 19 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.
453 BIOMOD Peptides Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-08-01Latest test date< 1 year COA history 0% underdosed0% low purity 29 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.
455 Shandong Shengyuan Peptide Technology Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-07-30Latest test date1+ year COA history 3% low purity 28 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.
82 SKO Compounds Explore test results U.S. reseller No buyer reviews indexed 33Unique reports 2026-07-09Latest test date< 1 year COA history 0% underdosed0% low purity 22 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.
452 LH PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-06-25Latest test date1+ year COA history 0% underdosed0% low purity 32 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.
450 Pinpoint Peptides Co. Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-06-23Latest test date< 1 year COA history 10% underdosed0% low purity 33 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.
454 Wellness Peptides Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-06-14Latest test date1+ year COA history 8% underdosed0% low purity 29 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.
456 Pep Pro Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2026-05-24Latest test date< 1 year COA history 8% underdosed0% low purity 26 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.
451 Olympian Pharmaceutical Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2024-11-08Latest test date1+ year COA history Fewer than 5 applicable tests 33 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.
462 AZTECAGOLD Explore test results Seller type not reviewed No buyer reviews indexed 33Unique reports 2022-10-15Latest test date5+ years COA history 78% low purity 0 33
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.
469 Mapping Aminos Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-10-09Latest test date1+ year COA history 7% underdosed0% low purity 26 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.
467 NRG Biolabs, LLC Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-10-02Latest test date< 1 year COA history 4% underdosed0% low purity 28 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.
471 Northstar Peptides Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-09-21Latest test date< 1 year COA history 0% underdosed0% low purity 19 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.
465 Nextechlabs Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-08-09Latest test date1+ year COA history 0% low purity 31 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.
473 APEXION RESEARCH LLC Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-07-18Latest test date< 1 year COA history 0% underdosed0% low purity 8 24
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.
470 Pepta Peptides Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-06-28Latest test date< 1 year COA history 0% underdosed0% low purity 26 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.
468 Thrive Peptides Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-06-18Latest test date< 1 year COA history 0% underdosed0% low purity 27 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.
463 GREY RESEARCH PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-06-10Latest test date< 1 year COA history 0% underdosed0% low purity 32 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.
466 Athena Peptides Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-03-24Latest test date1+ year COA history 3% underdosed0% low purity 30 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.
464 ThePeptide Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-01-19Latest test date< 1 year COA history 0% underdosed0% low purity 32 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.
472 Biogenix pharma Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2026-01-08Latest test date3+ years COA history 23% underdosed15% low purity 13 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.
474 Arctic Peptides Explore test results Seller type not reviewed No buyer reviews indexed 32Unique reports 2024-04-12Latest test date3+ years COA history 0% underdosed0% low purity 3 29
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.
485 ABSIM LLC / ABSIMPEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-10-09Latest test date< 1 year COA history 0% underdosed0% low purity 11 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.
482 Accel Aminos Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-10-08Latest test date< 1 year COA history 0% underdosed0% low purity 16 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.
478 Jax Aminos Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-10-05Latest test date< 1 year COA history 0% underdosed0% low purity 23 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.
480 EVOQ Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-10-02Latest test date1+ year COA history 0% underdosed0% low purity 19 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.
483 Lonestar Peptides + Research Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-09-01Latest test date< 1 year COA history 7% underdosed0% low purity 15 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.
477 Peptide Research Supply Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-08-31Latest test date1+ year COA history 0% low purity 27 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.
481 ZC Labs Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-08-13Latest test date< 1 year COA history 7% underdosed0% low purity 17 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.
475 Project Labs Research Group LLC Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-07-27Latest test date< 1 year COA history 0% underdosed0% low purity 30 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.
486 Seattle Aminos Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-07-26Latest test date< 1 year COA history 5% underdosed0% low purity 8 23
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.
476 TMS, LLC Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-06-28Latest test date< 1 year COA history 0% underdosed0% low purity 29 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.
484 aisenpeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-06-23Latest test date1+ year COA history 4% underdosed7% low purity 13 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.
479 Tidex Biotech Explore test results Seller type not reviewed No buyer reviews indexed 31Unique reports 2026-05-03Latest test date< 1 year COA history 4% underdosed3% low purity 20 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.
83 OroviaWellness Explore test results U.S. reseller No buyer reviews indexed 30Unique reports 2026-10-15Latest test date< 1 year COA history 4% underdosed0% low purity 14 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.
497 Infus Labs Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-10-10Latest test date< 1 year COA history 11% underdosed0% low purity 12 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.
498 InfinityChem Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-10-08Latest test date< 1 year COA history 12% underdosed0% low purity 9 21
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
- 121,000
- 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 · 17,264 unique reports · 41 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 · 57,121 unique reports · 363 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.