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.
1125 Seveny3 Aminos LLC Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-02-04Latest test date< 1 year COA history 0% underdosed0% low purity 12 0
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1126 Agfine Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2026-01-08Latest test date< 1 year COA history 0% low purity 12 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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1127 Nutrastrips (2) Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-12-20Latest test date< 1 year COA history 0% low purity 12 0
Lab evidence
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1128 Alpha Carbon Labs Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-12-02Latest test date< 1 year COA history 0% underdosed11% low purity 12 0
Lab evidence
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1129 Elite Health Global Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-11-24Latest test date< 1 year COA history 0% low purity 12 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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1130 I-Amino Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-11-08Latest test date< 1 year COA history 8% low purity 12 0
Lab evidence
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1131 Veteran Peptides Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-10-18Latest test date1+ year COA history 0% low purity 12 0
Lab evidence
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1132 ADVARPHARMA DK Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-10-13Latest test date1+ year COA history 40% underdosed 12 0
Lab evidence
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1133 PeptideGod Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-09-05Latest test date1+ year COA history 25% low purity 12 0
Lab evidence
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1161 Olympus Labs UK Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-05-21Latest test date3+ years COA history 0% underdosed 0 12
Lab evidence
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1134 Amplified Amino Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2025-02-19Latest test date1+ year COA history 0% low purity 12 0
Lab evidence
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1162 Guruite Biotechnology Co Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2024-10-07Latest test date2+ years COA history 0% underdosed0% low purity 0 12
Lab evidence
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1163 Southern Ghost Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2024-02-22Latest test date4+ years COA history Fewer than 5 applicable tests 0 12
Lab evidence
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1164 purity-pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 12Unique reports 2022-11-27Latest test date3+ years COA history Fewer than 5 applicable tests 0 12
Lab evidence
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1225 Wanshun Peptide Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-10-27Latest test date< 1 year COA history 0% low purity 0 11
Lab evidence
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1207 GritScript Performance Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-10-15Latest test date1+ year COA history 0% underdosed0% low purity 5 6
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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1217 Soflo Peptides Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-10-05Latest test date< 1 year COA history 0% underdosed0% low purity 3 8
Lab evidence
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1212 Milo's Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-25Latest test date< 1 year COA history 0% underdosed0% low purity 4 7
Lab evidence
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1200 NewBPeps Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-24Latest test date< 1 year COA history 0% low purity 8 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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1226 Unicorn Peptide Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-24Latest test date< 1 year COA history 0% low purity 0 11
Lab evidence
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1227 Vertexbio Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-23Latest test date< 1 year COA history Fewer than 5 applicable tests 0 11
Lab evidence
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1192 BioTek Peptides Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-21Latest test date< 1 year COA history 17% underdosed0% low purity 10 1
Lab evidence
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1218 Iluma Wellness Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-19Latest test date< 1 year COA history 0% underdosed0% low purity 3 8
Lab evidence
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1208 Proved Peptides Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-18Latest test date< 1 year COA history 0% low purity 5 6
Lab evidence
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1213 Glow Society Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-11Latest test date< 1 year COA history 0% underdosed0% low purity 4 7
Lab evidence
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1219 PEPTICODE Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-09Latest test date< 1 year COA history 0% underdosed0% low purity 3 8
Lab evidence
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1209 Lumera Elite Peptides Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-06Latest test date< 1 year COA history 0% underdosed0% low purity 5 6
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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1223 Alpha Polaris Labs Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-06Latest test date< 1 year COA history 0% underdosed0% low purity 2 9
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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1206 My Research Findings Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-09-03Latest test date< 1 year COA history 0% underdosed0% low purity 7 4
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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1197 OptiTide LLC Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-08-30Latest test date< 1 year COA history 0% low purity 9 2
Lab evidence
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1224 Gladiator Research Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-08-26Latest test date< 1 year COA history 0% underdosed9% low purity 2 9
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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1165 Fresno Biolabs Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-08-24Latest test date< 1 year COA history 0% low purity 11 0
Lab evidence
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1201 PrimeBio Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-08-18Latest test date< 1 year COA history 0% underdosed0% low purity 8 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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1202 KLOW-bio Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-08-15Latest test date< 1 year COA history 12% underdosed0% low purity 8 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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1210 BEST BIO LLC Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-08-09Latest test date< 1 year COA history 0% underdosed0% low purity 5 6
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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1220 Top Tier Science Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-08-04Latest test date< 1 year COA history 14% underdosed0% low purity 3 8
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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1211 Alpha Cell Research Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-07-22Latest test date< 1 year COA history 0% low purity 5 6
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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1221 GENYX Labs Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-07-21Latest test date< 1 year COA history 0% underdosed0% low purity 3 8
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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1214 AMERITIDE ELITE Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-07-16Latest test date< 1 year COA history 0% underdosed0% low purity 4 7
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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1222 NXTSTATE Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-07-14Latest test date< 1 year COA history 0% underdosed0% low purity 3 8
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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1203 SK Biotech Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-07-12Latest test date1+ year COA history 9% underdosed0% low purity 8 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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1215 High Octane Aminos Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-07-11Latest test date< 1 year COA history 0% underdosed0% low purity 4 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.
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1198 Sterile Peptides USA Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-07-08Latest test date< 1 year COA history 0% underdosed0% low purity 9 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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1166 REDLINE Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-07-01Latest test date< 1 year COA history 12% underdosed0% low purity 11 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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1193 55 Amino Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-06-26Latest test date< 1 year COA history 0% low purity 10 1
Lab evidence
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1167 Cytal Peptides Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-06-18Latest test date< 1 year COA history 0% underdosed0% low purity 11 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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1168 Lab Peppers Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-06-18Latest test date< 1 year COA history 0% underdosed0% low purity 11 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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1169 AHollo, LLC Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-06-15Latest test date< 1 year COA history 0% underdosed0% low purity 11 0
Lab evidence
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1170 Spyro Peptides Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-06-13Latest test date< 1 year COA history 0% underdosed0% low purity 11 0
Lab evidence
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1216 OasisResearch Explore test results Seller type not reviewed No buyer reviews indexed 11Unique reports 2026-06-12Latest test date< 1 year COA history 0% underdosed0% low purity 4 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.
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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
- 121,172
- 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 · 7,735 unique reports · 20 observed in 30 days
- Compare manufacturers, exporters and other international sellers by their independent lab reports.
- Domestic resellers
- 102 reviewed vendors · 17,278 unique reports · 44 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 · 57,179 unique reports · 353 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 2026-10-27. 24 measured results have no usable date.
Domestic resellers: Recorded lab dates 2020-01-31 to 2026-10-27. 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 vendors1,792 measured results11.2–100% purity in 1,726 results Domestic resellers2,076 measured results33.7–100% purity in 1,924 results TirzepatideLab results by vendor↗ International vendors1,288 measured results40.4–100% purity in 1,254 results Domestic resellers1,438 measured results55.9–100% purity in 1,334 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 vendors403 measured results12.7–100% purity in 383 results Domestic resellers583 measured results48.94–99.99% purity in 526 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.