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Vendors with the most tested samples showing at least one problem.
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2311 AminoHelix Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-11Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
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2312 Black Gold Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-11Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2313 Crossroads Lab Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-10Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2314 Altitude Aminos Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-09Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2315 Glowy Peps Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-09Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2316 Hyperion Laboratories Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-09Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2317 Peptide.Mom Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-09Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2318 Sync Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-09Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2319 Z Peps Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-09Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
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2320 AminoPlex Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-08Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2321 Global Help LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-08Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2322 Snowchelle Pepresearch Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-07Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2500 Nxir Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-06Latest test date< 1 year COA history Fewer than 5 applicable tests 0 2
Lab evidence
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2323 Guangzhou Wandai Biotechnology Co., Ltd. Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-05Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2324 Medicalflow Global Development Limited Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-05Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2325 Never Enough Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-05Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2326 256 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-04Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2327 Pep Rally Research Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-04Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2328 Peprally Solutions Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-03Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2329 The Wellness Collective Co-Op Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-02Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2471 Hainan Flying Intl Trade Co. / Ron Denning Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-02Latest test date< 1 year COA history Fewer than 5 applicable tests 1 1
Lab evidence
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2330 Next Health Solutions Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-01Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2501 Peptide People Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-06-01Latest test date< 1 year COA history Fewer than 5 applicable tests 0 2
Lab evidence
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2331 ATXPeps Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-31Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2332 LN Peptide / Ron Denning Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-30Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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2333 Bond, Peptide Bond, LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2334 Delta Research Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2335 Diaz Performance Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2336 JP Bio Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2337 M-Powered Marketing Solutions LLC Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2338 PND Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2339 Waterstone Health Management Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2472 NextGen Research (NRX) Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-27Latest test date< 1 year COA history Fewer than 5 applicable tests 1 1
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2340 Landmark Biotech Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-25Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2341 Helix Point Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-24Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2342 Taylor B. Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-24Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2343 True Aminos Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-24Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2344 VT Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-21Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2345 Kevin - Peps Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-18Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2346 GYUE BIOLOGICAL INDUSTRY COMPANY LIMITED Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2347 Marg/QingFuji Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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.
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2348 NrG Wellness Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2349 UE BIOLOGICAL INDUSTRY COMPANY LIMITED Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-16Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2350 Keystone Research Labs Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-14Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2351 TruePoint Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-14Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2352 Badger Compounds Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-11Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2353 Vitro Peptides Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-11Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2354 Optimal Peptide Solutions Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-08Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2355 WBS Shanghai Wibson Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-08Latest test date< 1 year COA history Fewer than 5 applicable tests 2 0
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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2356 Aura Cell Science, Rebel Lab, Aucus Pharma Explore test results Seller type not reviewed No buyer reviews indexed 2Unique reports 2026-05-04Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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.
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More reports means more evidence to inspect, not better quality. Each report counts once. Purity and amount percentages require at least five applicable results; explicit endotoxin failures are always shown. Missing measurements are not passes.
Understand the coverage
- Published COA report entries
- 121,035
- Ranked vendors across all seller groups
- 3,071
- Index refresh
Report dates are shown with each test. International classification does not establish factory ownership. U.S. resale does not establish U.S. manufacture.
The first 20 identities in each seller group’s original report-count ranking are shown to signed-in members. Changing the sort order does not change access. Vendors ranked 21 and below in those rankings remain named.
- International vendors
- 30 reviewed vendors · 7,704 unique reports · 19 observed in 30 days
- Compare manufacturers, exporters and other international sellers by their independent lab reports.
- Domestic resellers
- 102 reviewed vendors · 17,263 unique reports · 38 observed in 30 days
- Compare U.S.-based resellers. The seller is domestic; the product may still come from an overseas supplier.
- Seller type not reviewed
- 2,939 vendors · 57,120 unique reports · 344 observed in 30 days
- Sellers with independent lab reports whose seller type we have not reviewed yet.
Each report counts once, even when it tests several compounds or appears in multiple archives. Purity and dose results describe submitted samples, not everything a vendor sells. The methodology and known limitations explain eligibility and exclusions.
Explore recorded findings and compound comparisons
What is a domestic reseller?
A reseller buys from another supplier and sells under its own storefront or brand. Here, domestic means U.S.-based. Local shipping does not mean the product was made in the U.S. or tested after resale. Check the report for the actual batch.
Follow the evidence
Where the tests went wrong.
Recorded failures alongside the number of applicable tests. Choose a seller group to see the results behind each count.
Contamination findings
Failed endotoxin tests
Compare repeated failures in tests for bacterial endotoxins.
Below 97% purity
Low purity results
Vendors with the most measured purity results below 97%.
At least 10% short
Underfilled samples
See where tests found less compound than the stated amount.
Identity findings
Compound not found
Vendors with the most results that did not find the labeled compound.
What these counts include
All available results in the lab-findings comparisons. Each category counts only applicable tests; missing measurements do not count as passes. One sample can appear in several categories, but counts once in the overall total. These are counts of tested samples, not failure rates for everything a vendor sells.
International vendors: Recorded lab dates 2022-06-24 to 2026-10-20. 24 measured results have no usable date.
Domestic resellers: Recorded lab dates 2020-01-31 to 2026-10-22. 143 measured results have no usable date.
Choose your compound
Compare lab results
by compound.
Explore measured results, compare vendors and open their lab reports. These figures cover the same reviewed seller groups as the findings above.
GLP-1 and related compounds
RetatrutideLab results by vendor↗ International vendors1,779 measured results11.2–100% purity in 1,714 results Domestic resellers2,067 measured results33.7–100% purity in 1,915 results TirzepatideLab results by vendor↗ International vendors1,282 measured results40.4–100% purity in 1,248 results Domestic resellers1,436 measured results55.9–100% purity in 1,332 resultsGrowth hormone and related compounds
HGHLab results by vendor↗ International vendors79 measured results90.45–99.9% purity in 76 results Domestic resellers9 measured results96.14–99.84% purity in 9 results TesamorelinLab results by vendor↗ International vendors400 measured results12.7–100% purity in 380 results Domestic resellers582 measured results48.94–99.99% purity in 525 resultsRanges include measured purity above 0%. “Compound not found” is counted separately. The report library has broader coverage; vendor rankings apply their own minimum test counts.
Beyond the lab
What was it like to order?
Buyer reviews cover delivery, communication and service. Each keeps its date and source.