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Vendors with the most tested samples showing at least one problem.
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1876 Nexara Labs Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-24Latest test date< 1 year COA history Fewer than 5 applicable tests 4 0
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1877 Paramount Investment Group, INC. Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-24Latest test date< 1 year COA history Fewer than 5 applicable tests 4 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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1878 Ignite Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-22Latest 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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1879 S&H Consultants LLC Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-20Latest 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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1880 Wuhan Muwang Trading Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-20Latest 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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1881 Cglpeptide10 Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-06Latest 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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1882 RS Distributors Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-05Latest 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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1883 Vital Chains Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-05Latest 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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1884 ARP Health Solutions Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-02-03Latest 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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1885 Jigsaw Research Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-29Latest 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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1985 Bioprep LLC Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-27Latest 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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1986 Viogen Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-27Latest test date< 1 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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1987 Monsterlab :: Biotech Scandinavian Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-23Latest test date6+ 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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1886 Sunny Sky Peptides Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-19Latest 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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1887 HYTE Research Division Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-18Latest 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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1888 J.Trotter BioScience/BBB Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-15Latest 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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1889 PSY-Peptides/Huai'an Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-13Latest 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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1890 Nhancedpeptides Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-12Latest 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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1891 Novaglo Group LLC Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-09Latest 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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1924 RetaEU Netherlands Explore test results Seller type not reviewed No buyer reviews indexed 4Unique reports 2026-01-07Latest test date< 1 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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1988 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
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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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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1989 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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1959 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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1990 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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1925 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
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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1991 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
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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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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1992 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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1960 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
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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1993 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 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
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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1926 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
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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1994 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
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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1995 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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1996 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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1927 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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1903 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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1997 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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1998 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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1999 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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2000 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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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
- 121,101
- 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 · 7,705 unique reports · 20 observed in 30 days
- Compare manufacturers, exporters and other international sellers by their independent lab reports.
- Domestic resellers
- 102 reviewed vendors · 17,263 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 · 57,119 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 2026-10-27. 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 vendors1,779 measured results11.2–100% purity in 1,714 results Domestic resellers2,069 measured results33.7–100% purity in 1,917 results TirzepatideLab results by vendor↗ International vendors1,282 measured results40.4–100% purity in 1,248 results Domestic resellers1,437 measured results55.9–100% purity in 1,333 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.