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24 Glow Aminos Explore test results U.S. reseller No buyer reviews indexed 230Unique reports 2026-04-26Latest test date1+ year COA history 2% underdosed1% low purity 196 34
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18 Vendor name available with Pro Explore test results Seller type not reviewed No buyer reviews indexed 229Unique reports 2026-10-02Latest test date1+ year COA history 1% underdosed1% low purity 181 48
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25 Orbitrex Peptides Explore test results U.S. reseller No buyer reviews indexed 219Unique reports 2026-10-20Latest test date6+ years COA history 2% underdosed1% low purity 129 90
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19 Vendor name available with Pro Explore test results Seller type not reviewed No buyer reviews indexed 215Unique reports 2026-10-17Latest test date< 1 year COA history 1% underdosed0% low purity 15 200
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11 Vendor name available with Pro Explore test results International vendor No buyer reviews indexed 214Unique reports 2026-10-20Latest test date1+ year COA history 0% underdosed6% low purity 112 102
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13 Vendor name available with Pro Explore test results International vendor 429 buyer reviews 212Unique reports 2026-10-20Latest test date1+ year COA history 0% underdosed4% low purity 121 91
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12 Vendor name available with Pro Explore test results International vendor 557 buyer reviews 212Unique reports 2026-10-09Latest test date1+ year COA history 0% underdosed3% low purity7 endotoxin failures 161 51
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26 Peptidology Explore test results U.S. reseller No buyer reviews indexed 209Unique reports 2026-10-20Latest test date1+ year COA history 1% underdosed1% low purity 203 6
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14 Vendor name available with Pro Explore test results International vendor 77 buyer reviews 209Unique reports 2026-10-14Latest test date1+ year COA history 2% underdosed6% low purity 179 30
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20 Vendor name available with Pro Explore test results Seller type not reviewed No buyer reviews indexed 208Unique reports 2026-06-28Latest test date< 1 year COA history 5% underdosed0% low purity 208 0
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27 Crush Research Explore test results U.S. reseller No buyer reviews indexed 204Unique reports 2026-10-14Latest test date< 1 year COA history 11% underdosed1% low purity 167 37
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21 Oupeptide Explore test results Seller type not reviewed No buyer reviews indexed 204Unique reports 2026-09-15Latest test date1+ year COA history 0% underdosed4% low purity 179 25
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22 Somachems Explore test results Seller type not reviewed No buyer reviews indexed 198Unique reports 2026-10-08Latest test date1+ year COA history 11% underdosed5% low purity 146 52
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15 Vendor name available with Pro Explore test results International vendor 331 buyer reviews 196Unique reports 2026-10-06Latest test date6+ years COA history 0% underdosed2% low purity 171 25
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28 Peptide Gurus Explore test results U.S. reseller No buyer reviews indexed 189Unique reports 2026-09-01Latest test date2+ years COA history 3% underdosed8% low purity 112 77
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23 Hilma Biocare Explore test results Seller type not reviewed No buyer reviews indexed 188Unique reports 2026-06-22Latest test date8+ years COA history 9% underdosed31% low purity 72 116
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24 Real Peptides Explore test results Seller type not reviewed No buyer reviews indexed 187Unique reports 2026-06-25Latest test date1+ year COA history 2% underdosed3% low purity 166 21
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25 Amino Lair Explore test results Seller type not reviewed 9 buyer reviews 186Unique reports 2026-10-08Latest test date1+ year COA history 1% underdosed0% low purity 146 40
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16 Vendor name available with Pro Explore test results International vendor No buyer reviews indexed 183Unique reports 2026-10-08Latest test date1+ year COA history 3% low purity 154 29
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26 Peptide Crafters Explore test results Seller type not reviewed No buyer reviews indexed 182Unique reports 2026-10-12Latest test date2+ years COA history 0% underdosed5% low purity 90 92
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27 PeptidePlugs.com Explore test results Seller type not reviewed No buyer reviews indexed 181Unique reports 2026-10-16Latest test date4+ years COA history 3% underdosed1% low purity 64 117
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29 Eros Peptides Explore test results U.S. reseller No buyer reviews indexed 180Unique reports 2026-09-24Latest test date2+ years COA history 6% underdosed1% low purity 114 66
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28 Hxnet Explore test results Seller type not reviewed No buyer reviews indexed 178Unique reports 2026-10-12Latest test date2+ years COA history 2% low purity1 endotoxin failure 159 19
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30 Flawless Compounds Explore test results U.S. reseller No buyer reviews indexed 177Unique reports 2026-04-26Latest test date1+ year COA history 1% underdosed1% low purity 143 34
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29 Peptide Restore Explore test results Seller type not reviewed No buyer reviews indexed 175Unique reports 2026-10-16Latest test date< 1 year COA history 4% underdosed4% low purity 149 26
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30 Star Nutrasciences Inc. Explore test results Seller type not reviewed No buyer reviews indexed 175Unique reports 2026-08-04Latest test date< 1 year COA history 6% underdosed0% low purity 138 37
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17 Vendor name available with Pro Explore test results International vendor 627 buyer reviews 172Unique reports 2026-09-24Latest test date2+ years COA history 4% underdosed3% low purity1 endotoxin failure 151 21
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31 Genesis Peptides Explore test results Seller type not reviewed No buyer reviews indexed 170Unique reports 2026-10-10Latest test date1+ year COA history 2% underdosed0% low purity 111 59
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31 Bluum Peptides Explore test results U.S. reseller No buyer reviews indexed 169Unique reports 2026-10-21Latest test date< 1 year COA history 3% underdosed1% low purity 106 63
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32 Legendary Peptides Explore test results U.S. reseller No buyer reviews indexed 168Unique reports 2026-09-29Latest test date1+ year COA history 1% underdosed3% low purity 145 23
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32 Synthesis Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 165Unique reports 2026-10-10Latest test date1+ year COA history 1% underdosed2% low purity 119 46
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33 Modern Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 165Unique reports 2026-02-24Latest test date1+ year COA history 4% underdosed2% low purity 20 145
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34 NELA Peptides Explore test results Seller type not reviewed No buyer reviews indexed 163Unique reports 2026-09-26Latest test date1+ year COA history 5% underdosed1% low purity 98 65
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35 Xcel Peptides Explore test results Seller type not reviewed No buyer reviews indexed 162Unique reports 2026-03-11Latest test date3+ years COA history 6% underdosed0% low purity 3 159
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36 Novaglo Research Explore test results Seller type not reviewed No buyer reviews indexed 161Unique reports 2026-10-15Latest test date< 1 year COA history 0% underdosed3% low purity 129 32
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33 Omegamino Explore test results U.S. reseller No buyer reviews indexed 160Unique reports 2026-09-19Latest test date1+ year COA history 2% underdosed1% low purity 105 55
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37 Zen Aminos Explore test results Seller type not reviewed No buyer reviews indexed 160Unique reports 2026-09-13Latest test date1+ year COA history 4% underdosed1% low purity 128 32
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38 Short Chain Aminos Explore test results Seller type not reviewed No buyer reviews indexed 159Unique reports 2026-10-13Latest test date1+ year COA history 3% underdosed0% low purity 106 53
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18 Vendor name available with Pro Explore test results International vendor 742 buyer reviews 157Unique reports 2026-10-12Latest test date2+ years COA history 3% underdosed4% low purity 123 34
Lab evidence
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40 Pura Peptides Explore test results Seller type not reviewed 3 buyer reviews 157Unique reports 2026-10-02Latest test date1+ year COA history 1% underdosed3% low purity 114 43
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39 Optima Chemical Supply, Inc. Explore test results Seller type not reviewed No buyer reviews indexed 157Unique reports 2026-07-08Latest test date4+ years COA history 0% underdosed0% low purity 146 11
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41 Gulf Coast Amino Acids Explore test results Seller type not reviewed No buyer reviews indexed 156Unique reports 2026-10-17Latest test date1+ year COA history 1% underdosed1% low purity 114 42
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42 Pius Solutions, Inc. Explore test results Seller type not reviewed No buyer reviews indexed 155Unique reports 2026-10-16Latest test date< 1 year COA history 1% underdosed6% low purity 83 72
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43 Supernova Sciences Explore test results Seller type not reviewed No buyer reviews indexed 154Unique reports 2026-09-15Latest test date1+ year COA history 10% underdosed3% low purity 133 21
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44 INTEX PHARMA Explore test results Seller type not reviewed No buyer reviews indexed 154Unique reports 2026-02-16Latest test date5+ years COA history 11% underdosed33% low purity 0 154
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45 Coffee And Peppers Explore test results Seller type not reviewed No buyer reviews indexed 152Unique reports 2026-10-21Latest test date1+ year COA history 3% underdosed4% low purity 133 19
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46 Treasure Coast Peptides Explore test results Seller type not reviewed No buyer reviews indexed 152Unique reports 2026-10-18Latest test date1+ year COA history 5% underdosed3% low purity 114 38
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47 JT's Biocore LLC Explore test results Seller type not reviewed No buyer reviews indexed 152Unique reports 2026-10-08Latest test date< 1 year COA history 8% underdosed1% low purity 89 63
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34 Southern Aminos Explore test results U.S. reseller No buyer reviews indexed 152Unique reports 2026-09-18Latest test date1+ year COA history 3% underdosed2% low purity 130 22
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48 Peptide Pro Explore test results Seller type not reviewed No buyer reviews indexed 151Unique reports 2026-01-18Latest test date1+ year COA history 6% underdosed1% low purity 151 0
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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
- 120,981
- 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 · 17,266 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 · 57,122 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.
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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.