Overall findings
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Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
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2158 AMINO ELEMENTS LAB Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-05Latest test date< 1 year COA history Fewer than 5 applicable tests 1 2
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2187 Ningbo Shuyou Plasticization Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-05Latest 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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2128 PPP Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-04Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
Lab evidence
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2188 Faithful Chemical Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-04Latest test date< 1 year COA history 1 endotoxin failure 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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2189 Jiuqing Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-04Latest 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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2190 Lingmi Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-08-02Latest 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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2129 RVResearch Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-31Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2130 Axis Peptide Co. Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-30Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
Lab evidence
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2131 Bio-Hacking with Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-28Latest test date< 1 year COA history Fewer than 5 applicable tests 2 1
Lab evidence
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2159 Personal Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-21Latest test date< 1 year COA history Fewer than 5 applicable tests 1 2
Lab evidence
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2191 Shenzhen Aurora Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-20Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2132 Impact Aminos Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-19Latest test date1+ year COA history Fewer than 5 applicable tests 2 1
Lab evidence
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2133 BioHackr Health Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-18Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2134 Pepe & Co. Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-18Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2192 Leading Peptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-17Latest 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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2160 LVAC Inc Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-14Latest test date< 1 year COA history Fewer than 5 applicable tests 1 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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2193 Amino Essence Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-14Latest 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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2194 Hangzhou Qihang Xingcheng Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-13Latest 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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2195 Xingyue Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-13Latest test date1+ 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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2135 Look Labs (Alexander) Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-12Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2136 APEX Performance Peps Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-04Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2005 Project Amino Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-03Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2006 DB Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-02Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2007 Marvel Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-07-01Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2008 333 Wellness LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-28Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2009 Dune 5 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-27Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2010 Precise Glow Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-27Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2196 Hb Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-26Latest 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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2197 Ltp Lumina Trade Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-26Latest 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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2198 Luvia Rx Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-26Latest 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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2011 Elutide LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-21Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2012 Gemini BioTech Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-21Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2013 Peps Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-21Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2014 Ressentials Health Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-20Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2137 Health Research Systems Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-20Latest test date< 1 year COA history Fewer than 5 applicable tests 2 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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2015 AminoVita Wellness Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-18Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2016 Double S Peptide Research Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-17Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2017 NOUR LABS Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-17Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2018 PiperLabz LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-17Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2199 Peptide Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-17Latest test date1+ 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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2200 Shandong Huizhihan Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-16Latest 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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2019 Organix Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-15Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2020 Peptide Buyers Club Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-15Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2021 www.dqswpeptides.com Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-12Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2022 nan Runlian New Material Technology Co., Ltd. Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-09Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2023 Shenzhen LOGA Technology Co., Ltd Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-09Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2024 ASCND Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-08Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2025 aurobiopeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-08Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2026 AK Speedy Peps Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-07Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2027 Peptoria, LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2026-06-04Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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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.