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.
2227 Biospeptides.com Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-04Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
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2094 Target Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-03Latest test date< 1 year COA history Fewer than 5 applicable tests 3 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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2095 Blankchem Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-12-02Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2096 Thrive Bio Lab Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-28Latest test date1+ year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2097 Bio Health Peptide Proteins Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-27Latest 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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2098 Longevity Labs 2.0 Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-27Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2099 Awaken With Lexy LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-25Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2228 Henan Puca New Material Technology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-25Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2229 fytpeptide Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-20Latest test date< 1 year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2230 Carnivore Lifestyle Md Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-17Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2100 512 Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-11Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2101 Elite Lions Labs Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-11Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2102 Nourish Peptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-06Latest test date< 1 year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2231 Shandong Plateau New Materials Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-11-05Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2103 Peptides 4 Power Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-10-29Latest test date1+ year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2104 DIJU PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-10-28Latest test date1+ year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2105 WLDPEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-10-25Latest test date1+ year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2232 Markus Lanz Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-10-23Latest test date1+ year COA history Fewer than 5 applicable tests 0 3
Lab evidence
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2233 Bronco Meds Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-10-22Latest 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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2234 Shaanxi Suke Yuancheng Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-10-17Latest 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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2106 SafePro Labs Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-10-15Latest test date1+ year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2107 Golf Coast Amino Acids Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-09-26Latest test date1+ year COA history Fewer than 5 applicable tests 3 0
Lab evidence
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2108 Vagabond Muscle Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-09-24Latest test date1+ 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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2109 Ultra Pure Biosciences Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-09-17Latest test date1+ 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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2235 PepMart Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-09-10Latest 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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2236 CycoPept BioTech Co. LTD (CPB) Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-08-25Latest 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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2110 Dynamic3 Health Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-08-23Latest test date1+ 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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2237 www.AminoAlchemy.com Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-08-12Latest 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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2238 ZYH Biotechnology Company Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-08-12Latest 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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2111 Peptide ICE Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-08-08Latest test date1+ 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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2112 Vitality Research Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-07-24Latest test date1+ 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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2113 TruPeptides Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-07-17Latest test date1+ 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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2239 Meditechpharmaceutical.ch Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-07-16Latest 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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2240 MiaTide Technology Co.Ltd Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-07-08Latest 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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2114 FPPG MOTSC Group Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-07-05Latest test date1+ 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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2241 ZYH Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-06-26Latest test date1+ year COA history 20% underdosed0% low purity 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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2242 Stratelabs LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-06-24Latest test date4+ years 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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2115 Diamond Slim Distributor Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-06-21Latest test date1+ 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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2116 PepTidea Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-06-17Latest test date1+ 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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2243 semagl Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-05-09Latest test date2+ years 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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2244 Magnus Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-04-17Latest 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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2117 EZelev8 LLC Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-04-15Latest test date1+ 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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2164 Spectrum Pharma Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2025-03-07Latest test date3+ years 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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2245 Prime Aminos Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2024-10-24Latest test date2+ years 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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2246 MisteRoidPharma.website Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2024-10-16Latest test date2+ years 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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2247 LCDP Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2024-08-02Latest test date2+ years 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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2248 2632 Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2024-07-09Latest test date2+ years 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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2249 Flex Pharma Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2024-01-02Latest test date2+ years 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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2250 MUSCULEX.COM Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2023-10-18Latest test date3+ years 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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2251 Felicitas Explore test results Seller type not reviewed No buyer reviews indexed 3Unique reports 2023-08-25Latest test date3+ years 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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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
- 121,045
- 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.