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Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
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2043 Magnum Bio Health and Wellness Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-05-08Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
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2044 Logan Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-05-07Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2161 SigmaTech Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-05-07Latest test date1+ year COA history Fewer than 5 applicable tests 1 2
Lab evidence
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2045 LUXAMINOS Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-05-04Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2046 MX Scientific Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-05-04Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2204 Hk Fat Cat Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-05-02Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2047 Prime Alpha Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-05-01Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2048 RAC PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-29Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2205 Guangzhou Hesheng Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-28Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2206 Suzhou Redgia Biotech Rdg Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-28Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2049 Anani Science Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-27Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2050 Sweet Leaf Botanicals LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-27Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2207 Ronghui Hong Kong Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-23Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2051 Individual Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-18Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2052 412 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2053 Optimal Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2054 www.hkuppeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2055 www.taikangbio.com Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2056 www.taishijie.com Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2057 www.zjpeptix.com Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2139 MAXXER Biotech Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
Lab evidence
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2140 Peptide Prime Co Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-14Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
Lab evidence
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2058 Galactyx Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-12Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2059 Helixra Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-12Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2060 PepStep Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-11Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2061 Code 3 Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-09Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2062 Pixiewood Grove Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-08Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2141 Red Helix Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-04-01Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2063 Upkeep Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-26Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2208 Peptide Supply Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-25Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2142 TriTide Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-22Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2064 Proper Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-20Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2209 Quzhou Kecheng Jitai Trading Firm Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-19Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
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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2065 PEPLIX Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-17Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2210 Huaian Banting Trading Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-13Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
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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2066 valhallashop.pro Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-12Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2162 Peptide Labworks Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-12Latest test date1+ year COA history Fewer than 5 applicable tests 1 2
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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2211 Alphaback Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-10Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2067 Perpetual Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-07Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2212 China Suyue Technology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-07Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
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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2213 Lyra Biomeds Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-06Latest test date< 1 year COA history Fewer than 5 applicable tests 0 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.
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2068 Better Life Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-05Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2069 UnionLabs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2214 Domestic Peps Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2215 Sigma Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2216 Xc Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2217 Xingtai Yingpeptide Technology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-03-03Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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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2070 Vici Biotech Corp Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-28Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2071 PepGeniX Biotechnology CO Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-26Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2163 Nexa Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-02-26Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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.
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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.