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.
348 Kingdom Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 43Unique reports 2026-10-07Latest test date< 1 year COA history 0% underdosed0% low purity 17 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.
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
344 Ln Peptides Explore test results Seller type not reviewed No buyer reviews indexed 43Unique reports 2026-09-18Latest test date1+ year COA history 5% low purity 36 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.
346 Stacked Essentials Explore test results Seller type not reviewed No buyer reviews indexed 43Unique reports 2026-09-10Latest test date< 1 year COA history 6% underdosed0% low purity 28 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.
343 Peptide Minds Explore test results Seller type not reviewed No buyer reviews indexed 43Unique reports 2026-06-12Latest test date< 1 year COA history 14% underdosed4% low purity 39 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.
349 New Wave Peptides Ltd Explore test results Seller type not reviewed No buyer reviews indexed 43Unique reports 2026-04-17Latest test date1+ year COA history 10% underdosed0% low purity 13 30
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.
357 NewGenix Evolution Explore test results Seller type not reviewed No buyer reviews indexed 42Unique reports 2026-10-14Latest test date< 1 year COA history 6% underdosed0% low purity 12 30
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.
352 Pure Peptide Supply Explore test results Seller type not reviewed No buyer reviews indexed 42Unique reports 2026-10-08Latest test date1+ year COA history 3% underdosed0% low purity 35 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.
356 Zhengzhou Lan Yun Cosmetic Trading Explore test results Seller type not reviewed No buyer reviews indexed 42Unique reports 2026-10-07Latest test date< 1 year COA history 5% low purity 20 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.
355 Primal King Peptides Explore test results Seller type not reviewed No buyer reviews indexed 42Unique reports 2026-09-21Latest test date< 1 year COA history 6% underdosed0% low purity 28 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.
353 Royal Peptides Explore test results Seller type not reviewed No buyer reviews indexed 42Unique reports 2026-08-25Latest test date2+ years COA history 0% underdosed0% low purity 32 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.
354 Porter Peptides Explore test results Seller type not reviewed No buyer reviews indexed 42Unique reports 2026-08-06Latest test date< 1 year COA history 0% underdosed0% low purity 29 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.
351 Research Peptides Lab Explore test results Seller type not reviewed No buyer reviews indexed 42Unique reports 2026-01-09Latest test date1+ year COA history 0% underdosed5% low purity 42 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.
358 ameanopeptides.com Explore test results Seller type not reviewed No buyer reviews indexed 42Unique reports 2025-10-21Latest test date1+ year COA history 0% underdosed0% low purity 12 30
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.
366 ITide Labs Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-10-22Latest test date< 1 year COA history 3% underdosed2% low purity 23 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.
370 JoeLu's Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-10-16Latest test date< 1 year COA history 0% underdosed0% low purity 15 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.
367 LEARSI Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-10-06Latest test date< 1 year COA history 0% underdosed0% low purity 23 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.
369 TBD Peptides Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-10-02Latest test date< 1 year COA history 12% underdosed0% low purity 18 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.
360 Prospera Peptides Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-09-26Latest test date< 1 year COA history 4% underdosed3% low purity 36 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.
362 XYX — Nanjing Xiyuxun Technology Xyx Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-09-24Latest test date1+ year COA history 0% underdosed0% low purity 32 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.
368 Profound Peptides Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-09-19Latest test date< 1 year COA history 3% underdosed0% low purity 21 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.
361 Zztai Peptide Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-09-07Latest test date1+ year COA history 2% low purity 35 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.
371 Front Range Aminos Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-08-11Latest test date< 1 year COA history 4% underdosed0% low purity 8 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.
359 Valor Peptides Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-07-30Latest test date< 1 year COA history 12% underdosed0% low purity 38 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.
364 usroids.com Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-07-24Latest test date< 1 year COA history Fewer than 5 applicable tests 27 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.
363 Injectify Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-05-08Latest test date1+ year COA history 33% underdosed15% low purity 32 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.
365 SubQ Scientist Explore test results Seller type not reviewed No buyer reviews indexed 41Unique reports 2026-04-28Latest test date1+ year COA history 0% underdosed0% low purity 24 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.
78 Amino Amigos Explore test results U.S. reseller No buyer reviews indexed 41Unique reports 2025-07-16Latest test date1+ year COA history 23% low purity 41 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.
374 PTB — Peptronix Bio Ptb Explore test results Seller type not reviewed 482 buyer reviews 40Unique reports 2026-10-20Latest test date1+ year COA history 0% underdosed5% low purity 35 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.
375 RedsPeps Explore test results Seller type not reviewed No buyer reviews indexed 40Unique reports 2026-09-16Latest test date< 1 year COA history 11% underdosed0% low purity 31 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.
79 GigaCompounds Explore test results U.S. reseller No buyer reviews indexed 40Unique reports 2026-08-13Latest test date< 1 year COA history 9% underdosed12% low purity 40 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.
377 Kratos Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 40Unique reports 2026-08-12Latest test date< 1 year COA history 8% underdosed0% low purity 24 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.
376 EternaWell Peptides Explore test results Seller type not reviewed No buyer reviews indexed 40Unique reports 2026-07-27Latest test date< 1 year COA history 6% underdosed3% low purity 28 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.
372 Regenx Lab Explore test results Seller type not reviewed No buyer reviews indexed 40Unique reports 2026-01-28Latest test date< 1 year COA history 0% underdosed0% low purity 40 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.
373 S1 Research Explore test results Seller type not reviewed No buyer reviews indexed 40Unique reports 2026-01-09Latest test date1+ year COA history 0% underdosed3% low purity 40 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.
385 Novabio Research Explore test results Seller type not reviewed No buyer reviews indexed 39Unique reports 2026-10-21Latest test date< 1 year COA history 0% low purity 0 39
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.
380 Basic Tides Explore test results Seller type not reviewed No buyer reviews indexed 39Unique reports 2026-10-06Latest test date< 1 year COA history 0% underdosed0% low purity 22 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.
81 Chimera Peptides Explore test results U.S. reseller No buyer reviews indexed 39Unique reports 2026-10-05Latest test date1+ year COA history 0% low purity 30 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.
384 ChoicePeps Explore test results Seller type not reviewed No buyer reviews indexed 39Unique reports 2026-09-29Latest test date< 1 year COA history 0% underdosed0% low purity 10 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.
379 Aloha Aminos Explore test results Seller type not reviewed No buyer reviews indexed 39Unique reports 2026-09-24Latest test date< 1 year COA history 0% underdosed0% low purity 28 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.
383 Medda Labs Explore test results Seller type not reviewed No buyer reviews indexed 39Unique reports 2026-09-18Latest test date1+ year COA history 3% underdosed0% low purity 16 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.
381 Sigma Compounds Explore test results Seller type not reviewed No buyer reviews indexed 39Unique reports 2026-09-06Latest test date< 1 year COA history 0% underdosed0% low purity 18 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.
382 Aminoxgen Explore test results Seller type not reviewed No buyer reviews indexed 39Unique reports 2026-08-30Latest test date< 1 year COA history 0% underdosed0% low purity 17 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.
80 RIVN Peptides Explore test results U.S. reseller No buyer reviews indexed 39Unique reports 2026-07-01Latest test date< 1 year COA history 10% underdosed0% low purity 39 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.
378 Prosper Labs Explore test results Seller type not reviewed No buyer reviews indexed 39Unique reports 2026-05-28Latest test date< 1 year COA history 7% underdosed0% low purity 39 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.
392 Yuansense Tech Explore test results Seller type not reviewed No buyer reviews indexed 38Unique reports 2026-10-12Latest test date< 1 year COA history 3% underdosed2% low purity1 endotoxin failure 26 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.
395 Nexgen Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 38Unique reports 2026-10-10Latest test date< 1 year COA history 11% underdosed0% low purity 19 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.
398 G3 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 38Unique reports 2026-10-10Latest test date< 1 year COA history 0% underdosed0% low purity 1 37
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.
397 HLX Labs Explore test results Seller type not reviewed No buyer reviews indexed 38Unique reports 2026-10-06Latest test date< 1 year COA history 10% underdosed0% low purity 3 35
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.
396 Peptide Haus Explore test results Seller type not reviewed No buyer reviews indexed 38Unique reports 2026-10-02Latest test date< 1 year COA history 0% underdosed0% low purity 18 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.
388 Silverstone Labs Co. Explore test results Seller type not reviewed No buyer reviews indexed 38Unique reports 2026-09-24Latest test date< 1 year COA history 0% underdosed0% low purity 34 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.
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.