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.
1989 Modern-Peptides.com Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-12-29Latest test date1+ year COA history Fewer than 5 applicable tests 0 4
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1892 5 Arrows Peptides Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-12-25Latest test date< 1 year COA history Fewer than 5 applicable tests 4 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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1893 FastFit Peptides Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-12-19Latest test date< 1 year COA history Fewer than 5 applicable tests 4 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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1990 Alpha Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-12-17Latest test date1+ year COA history Fewer than 5 applicable tests 0 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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1960 HVYresearch.com Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-12-08Latest test date2+ years COA history Fewer than 5 applicable tests 1 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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1894 XL Explore test results Seller type not reviewed 4 buyer reviews 4Unique reports 2025-12-02Latest test date< 1 year COA history Fewer than 5 applicable tests 4 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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1895 Pure Peptide Solutions Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-11-28Latest test date< 1 year COA history Fewer than 5 applicable tests 4 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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1991 EuroPeptides Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-11-13Latest test date2+ years COA history Fewer than 5 applicable tests 0 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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1926 CNRAW Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-11-05Latest test date1+ year COA history Fewer than 5 applicable tests 3 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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1992 LIMITLESS biotech Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-11-03Latest test date2+ years COA history Fewer than 5 applicable tests 0 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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1896 jugGaKNot Empire Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-10-20Latest test date1+ year COA history Fewer than 5 applicable tests 4 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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1897 Diju Peptides Wellness And Co Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-10-17Latest test date1+ year COA history Fewer than 5 applicable tests 4 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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1993 protopeptide.is Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-10-11Latest test date1+ year COA history Fewer than 5 applicable tests 0 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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1898 Moon Peptides Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-10-10Latest test date1+ year COA history Fewer than 5 applicable tests 4 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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1899 Peptide Inferno Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-10-08Latest test date1+ year COA history Fewer than 5 applicable tests 4 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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1900 Zenith Peptides Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-10-01Latest test date1+ year COA history Fewer than 5 applicable tests 4 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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1961 ALLUVI HEALTH CARE Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-10-01Latest test date1+ year COA history Fewer than 5 applicable tests 1 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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1901 Forged Aminos Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-09-11Latest test date1+ year COA history Fewer than 5 applicable tests 4 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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1994 SH Peptide Ltd Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-09-11Latest test date1+ year COA history Fewer than 5 applicable tests 0 4
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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1902 Gulf Coast Amino Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-09-05Latest test date1+ year COA history Fewer than 5 applicable tests 4 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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1903 NEXPEP Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-07-25Latest test date1+ year COA history Fewer than 5 applicable tests 4 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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1927 Opti Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-07-08Latest test date2+ years COA history Fewer than 5 applicable tests 3 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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1995 AUCTUS PHARMA GROUP Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2025-02-19Latest test date1+ year COA history Fewer than 5 applicable tests 0 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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1996 Bulko Labs Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2024-11-06Latest test date1+ year COA history Fewer than 5 applicable tests 0 4
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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1997 Normatech Laboratories Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2024-10-17Latest test date2+ years COA history Fewer than 5 applicable tests 0 4
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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1928 Optima Chemical Supplies, Inc. Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2024-08-01Latest test date2+ years COA history Fewer than 5 applicable tests 3 1
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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1904 Baboon Pharma Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2024-02-12Latest test date2+ years COA history Fewer than 5 applicable tests 4 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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1998 Pharmaqo Labs Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2024-02-01Latest test date2+ years COA history Fewer than 5 applicable tests 0 4
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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1999 Anabolic Kings UK Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2023-07-28Latest test date3+ years COA history Fewer than 5 applicable tests 0 4
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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2000 androbolics.com Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2023-07-18Latest test date3+ years COA history Fewer than 5 applicable tests 0 4
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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2001 Summit Labs Canada Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2023-02-23Latest test date3+ years COA history Fewer than 5 applicable tests 0 4
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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2002 NeoSupps Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2021-04-16Latest test date5+ years COA history Fewer than 5 applicable tests 0 4
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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2003 Rewix Labs Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2020-07-24Latest test date6+ years COA history Fewer than 5 applicable tests 0 4
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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2166 Sennuo Community Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-12Latest 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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2118 Sunshine Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-10Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
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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2143 Peptide Resource Center / PRC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-08Latest 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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2167 Lunivo Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-06Latest 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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2168 Guangdong Tyran Technology Group Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-05Latest 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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2169 Wellness Research Supply Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-05Latest test date1+ 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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2170 Zhongkechu Peptide Linyi Biotech Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-10-01Latest 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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2144 Johnny 5 Peptide Group Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-30Latest 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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2171 Chenhao Biohealth Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-30Latest 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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2145 Encompass Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-29Latest 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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2146 Genea Wellness Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-27Latest 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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2147 PepDaddy Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-27Latest 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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2172 Aodt Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-25Latest 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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2173 Pai Chemicals Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-25Latest 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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2174 Peptide Boost Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-25Latest 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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2175 Viva Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-25Latest 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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2148 Raina's Summit, LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-09-24Latest test date1+ 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
- 121,052
- 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.