Overall findings
Most lab-test failures
Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
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839 www.meipeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-08-04Latest test date1+ year COA history 0% underdosed0% low purity 17 0
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871 Bioprecise Llc Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-08-03Latest test date< 1 year COA history 6% low purity 0 17
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866 Peptide Armor Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-07-20Latest test date< 1 year COA history 8% underdosed0% low purity 8 9
Lab evidence
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860 Formal Peptides Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-07-15Latest test date< 1 year COA history 7% underdosed0% low purity 12 5
Lab evidence
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857 Pharma Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-07-03Latest test date< 1 year COA history 15% underdosed0% low purity 13 4
Lab evidence
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854 East Coast Labs Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-06-21Latest test date< 1 year COA history 0% underdosed0% low purity 14 3
Lab evidence
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840 Elitegen labs Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-06-18Latest test date< 1 year COA history 0% low purity 17 0
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841 Pelican Peptides Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-06-17Latest test date< 1 year COA history 8% underdosed0% low purity 17 0
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842 Kingdom Peptides USA Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-06-02Latest test date< 1 year COA history 0% underdosed0% low purity 17 0
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843 Merit Bio Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-05-23Latest test date< 1 year COA history 8% underdosed0% low purity 17 0
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844 Vero Labs Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-05-23Latest test date< 1 year COA history 8% underdosed0% low purity 17 0
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845 Procare Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-05-04Latest test date< 1 year COA history 0% underdosed0% low purity 17 0
Lab evidence
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870 Quality Research Molecules Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-04-17Latest test date< 1 year COA history 7% underdosed0% low purity 3 14
Lab evidence
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846 DocRx Inc. Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-04-11Latest test date< 1 year COA history 0% underdosed0% low purity 17 0
Lab evidence
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847 RUO Peptide Labs Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-04-05Latest test date< 1 year COA history 13% underdosed0% low purity 17 0
Lab evidence
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852 Canadian Peptides Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-03-12Latest test date< 1 year COA history 8% underdosed6% low purity 15 2
Lab evidence
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872 Chameleon Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-03-12Latest test date< 1 year COA history 20% underdosed12% low purity 0 17
Lab evidence
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873 www.wanxipeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-03-11Latest test date< 1 year COA history 7% underdosed0% low purity 0 17
Lab evidence
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853 AAS Raws Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-03-06Latest test date3+ years COA history 79% low purity 15 2
Lab evidence
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855 Gulf Coast Aminos Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-03-06Latest test date< 1 year COA history 0% underdosed0% low purity 14 3
Lab evidence
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874 Golden Dragon Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-02-23Latest test date2+ years COA history 0% underdosed22% low purity 0 17
Lab evidence
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848 Prosperity Peptides Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-02-21Latest test date< 1 year COA history 8% underdosed0% low purity 17 0
Lab evidence
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849 PeptLogicLLC Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2026-01-26Latest test date< 1 year COA history 0% underdosed0% low purity 17 0
Lab evidence
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850 Baicaoxiangpeptide Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2025-11-19Latest test date< 1 year COA history 0% low purity 17 0
Lab evidence
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875 molipeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2025-09-19Latest test date1+ year COA history 7% underdosed8% low purity 0 17
Lab evidence
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876 PURITY SPORT STYLE Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2025-08-25Latest test date1+ year COA history Fewer than 5 applicable tests 0 17
Lab evidence
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877 A-tech Labs Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2025-04-29Latest test date1+ year COA history Fewer than 5 applicable tests 0 17
Lab evidence
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878 Apoxar Labs Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2024-10-16Latest test date5+ years COA history Fewer than 5 applicable tests 0 17
Lab evidence
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879 Quanta Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2024-09-27Latest test date2+ years COA history 20% underdosed 0 17
Lab evidence
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880 Cygnus Pharmaceutical group Explore test results Seller type not reviewed No buyer reviews indexed 17Unique reports 2023-09-28Latest test date7+ years COA history Fewer than 5 applicable tests 0 17
Lab evidence
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898 JCE — Jinan Elitepeptide Chemical Jec Jce Explore test results Seller type not reviewed 1 buyer review 16Unique reports 2026-10-16Latest test date1+ year COA history 7% low purity 12 4
Lab evidence
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893 Amino Asylum Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-10-12Latest test date1+ year COA history 0% low purity 15 1
Lab evidence
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899 LumiGlow Peptides Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-10-06Latest test date< 1 year COA history 0% underdosed0% low purity 12 4
Lab evidence
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894 Fortressofkits.com Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-09-28Latest test date< 1 year COA history 15% underdosed0% low purity 15 1
Lab evidence
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911 JPeptics Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-09-22Latest test date1+ year COA history 9% underdosed0% low purity 7 9
Lab evidence
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912 Peptide Depot USA Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-09-21Latest test date< 1 year COA history 10% underdosed0% low purity 7 9
Lab evidence
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915 Neo Compounds Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-09-21Latest test date< 1 year COA history 8% underdosed0% low purity 5 11
Lab evidence
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917 Railtides Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-09-10Latest test date< 1 year COA history 0% underdosed0% low purity 4 12
Lab evidence
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906 Exceptional Peptide Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-09-09Latest test date< 1 year COA history 0% underdosed0% low purity 9 7
Lab evidence
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913 Peptides PR Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-09-05Latest test date< 1 year COA history 0% underdosed0% low purity 7 9
Lab evidence
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908 NOX Peptides Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-08-27Latest test date< 1 year COA history 11% underdosed0% low purity 8 8
Lab evidence
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900 Vita Peptide Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-08-21Latest test date< 1 year COA history 0% underdosed0% low purity 12 4
Lab evidence
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909 Retapure Research Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-08-21Latest test date< 1 year COA history 8% underdosed0% low purity 8 8
Lab evidence
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916 Baseline Research Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-08-21Latest test date< 1 year COA history 21% underdosed0% low purity 5 11
Lab evidence
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907 Uvie Biotech Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-08-20Latest test date< 1 year COA history 0% underdosed0% low purity 9 7
Lab evidence
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903 Rat Cartel Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-08-16Latest test date< 1 year COA history 0% underdosed0% low purity 11 5
Lab evidence
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881 S&C Collective Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-08-04Latest test date< 1 year COA history 0% underdosed0% low purity 16 0
Lab evidence
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895 MS Transformations Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-07-30Latest test date< 1 year COA history 8% underdosed0% low purity 15 1
Lab evidence
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896 PrettyLabs Research Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-07-28Latest test date< 1 year COA history 0% underdosed0% low purity 14 2
Lab evidence
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905 Peptime Explore test results Seller type not reviewed No buyer reviews indexed 16Unique reports 2026-07-21Latest test date< 1 year COA history 0% underdosed0% low purity 10 6
Lab evidence
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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
- 121,052
- 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.