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.
161 Prime Pharmaceuticals Explore test results Seller type not reviewed No buyer reviews indexed 76Unique reports 2025-09-23Latest test date3+ years COA history 8% underdosed50% low purity 20 56
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163 Ehz Peptides Explore test results Seller type not reviewed No buyer reviews indexed 75Unique reports 2026-10-08Latest test date1+ year COA history 1% low purity 51 24
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164 Independent Peptide Explore test results Seller type not reviewed No buyer reviews indexed 75Unique reports 2026-10-08Latest test date< 1 year COA history 2% underdosed1% low purity 46 29
Lab evidence
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165 Maddox Research Explore test results Seller type not reviewed No buyer reviews indexed 75Unique reports 2026-10-08Latest test date< 1 year COA history 3% underdosed0% low purity 36 39
Lab evidence
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166 FirstForm Peptides Explore test results Seller type not reviewed No buyer reviews indexed 75Unique reports 2026-10-06Latest test date< 1 year COA history 5% underdosed0% low purity 34 41
Lab evidence
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167 biopharmaservice Explore test results Seller type not reviewed No buyer reviews indexed 75Unique reports 2025-02-26Latest test date4+ years COA history Fewer than 5 applicable tests 0 75
Lab evidence
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168 Peptology Labs Explore test results Seller type not reviewed No buyer reviews indexed 74Unique reports 2026-10-16Latest test date< 1 year COA history 12% underdosed0% low purity 63 11
Lab evidence
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170 PepGenics Research Explore test results Seller type not reviewed No buyer reviews indexed 74Unique reports 2026-09-26Latest test date< 1 year COA history 8% underdosed0% low purity 39 35
Lab evidence
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169 Peptislim Explore test results Seller type not reviewed No buyer reviews indexed 74Unique reports 2026-09-05Latest test date1+ year COA history 0% low purity 61 13
Lab evidence
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171 Purity Trace Explore test results Seller type not reviewed No buyer reviews indexed 74Unique reports 2026-08-30Latest test date< 1 year COA history 2% underdosed0% low purity 34 40
Lab evidence
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173 BioEdge Explore test results Seller type not reviewed No buyer reviews indexed 73Unique reports 2026-09-17Latest test date1+ year COA history 8% underdosed2% low purity 62 11
Lab evidence
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172 American Quality Peptides Explore test results Seller type not reviewed No buyer reviews indexed 73Unique reports 2026-06-15Latest test date< 1 year COA history 7% underdosed3% low purity 70 3
Lab evidence
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174 DEUS MEDICAL Explore test results Seller type not reviewed No buyer reviews indexed 73Unique reports 2026-04-27Latest test date6+ years COA history 0% underdosed17% low purity 8 65
Lab evidence
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175 PARA PHARMA Explore test results Seller type not reviewed No buyer reviews indexed 73Unique reports 2025-12-30Latest test date5+ years COA history 4% underdosed0% low purity 0 73
Lab evidence
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176 Pantheon Explore test results Seller type not reviewed No buyer reviews indexed 72Unique reports 2026-10-16Latest test date1+ year COA history 4% underdosed1% low purity 58 14
Lab evidence
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177 Vericor Explore test results Seller type not reviewed No buyer reviews indexed 72Unique reports 2026-09-22Latest test date< 1 year COA history 3% underdosed0% low purity 48 24
Lab evidence
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62 Step One Ventures Explore test results U.S. reseller No buyer reviews indexed 72Unique reports 2026-09-10Latest test date1+ year COA history 4% underdosed0% low purity 59 13
Lab evidence
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179 Red Dirt Research Explore test results Seller type not reviewed No buyer reviews indexed 71Unique reports 2026-10-14Latest test date1+ year COA history 4% underdosed0% low purity 42 29
Lab evidence
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180 Southwest Biologix Explore test results Seller type not reviewed No buyer reviews indexed 71Unique reports 2026-10-01Latest test date< 1 year COA history 5% underdosed0% low purity 19 52
Lab evidence
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178 My Pure Peptide Explore test results Seller type not reviewed No buyer reviews indexed 71Unique reports 2026-08-13Latest test date< 1 year COA history 0% underdosed0% low purity 68 3
Lab evidence
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182 Peptide Foundry Explore test results Seller type not reviewed No buyer reviews indexed 70Unique reports 2026-09-29Latest test date< 1 year COA history 8% underdosed0% low purity 47 23
Lab evidence
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63 AIO Peptides Explore test results U.S. reseller No buyer reviews indexed 70Unique reports 2026-09-14Latest test date1+ year COA history 10% underdosed1% low purity 52 18
Lab evidence
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181 Over Match Labs Explore test results Seller type not reviewed No buyer reviews indexed 70Unique reports 2026-09-09Latest test date< 1 year COA history 8% underdosed2% low purity 59 11
Lab evidence
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184 Sterile Labs Explore test results Seller type not reviewed No buyer reviews indexed 70Unique reports 2026-09-06Latest test date< 1 year COA history 7% underdosed0% low purity 33 37
Lab evidence
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183 RGVELITE Explore test results Seller type not reviewed No buyer reviews indexed 70Unique reports 2026-08-29Latest test date< 1 year COA history 8% underdosed0% low purity 38 32
Lab evidence
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188 Everest Peptides Explore test results Seller type not reviewed No buyer reviews indexed 69Unique reports 2026-10-10Latest test date< 1 year COA history 2% underdosed1% low purity 30 39
Lab evidence
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187 Glow Peptides Explore test results Seller type not reviewed No buyer reviews indexed 69Unique reports 2026-09-23Latest test date< 1 year COA history 8% underdosed0% low purity 54 15
Lab evidence
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186 Avara Explore test results Seller type not reviewed No buyer reviews indexed 69Unique reports 2026-08-11Latest test date< 1 year COA history 0% underdosed0% low purity 60 9
Lab evidence
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185 FITSKNS Explore test results Seller type not reviewed No buyer reviews indexed 69Unique reports 2026-05-11Latest test date1+ year COA history 0% low purity 65 4
Lab evidence
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194 KR — Kerui Peptide HongKong Co., Ltd Explore test results Seller type not reviewed 6 buyer reviews 68Unique reports 2026-10-05Latest test date1+ year COA history 8% underdosed9% low purity 29 39
Lab evidence
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195 R3VIVE Labs Explore test results Seller type not reviewed No buyer reviews indexed 68Unique reports 2026-10-02Latest test date< 1 year COA history 7% underdosed0% low purity 24 44
Lab evidence
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193 Xingtai Jiachuang Technology Explore test results Seller type not reviewed No buyer reviews indexed 68Unique reports 2026-09-16Latest test date1+ year COA history 2% low purity 44 24
Lab evidence
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192 Unique ChemX Explore test results Seller type not reviewed No buyer reviews indexed 68Unique reports 2026-09-13Latest test date< 1 year COA history 7% underdosed2% low purity 48 20
Lab evidence
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191 SPB Explore test results Seller type not reviewed 30 buyer reviews 68Unique reports 2026-08-28Latest test date1+ year COA history 3% underdosed0% low purity2 endotoxin failures 51 17
Lab evidence
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64 Atomik Labz Explore test results U.S. reseller No buyer reviews indexed 68Unique reports 2026-08-12Latest test date1+ year COA history 0% low purity 66 2
Lab evidence
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190 HelixPep Explore test results Seller type not reviewed No buyer reviews indexed 68Unique reports 2026-07-20Latest test date< 1 year COA history 20% underdosed1% low purity 52 16
Lab evidence
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189 Peptide Club Explore test results Seller type not reviewed No buyer reviews indexed 68Unique reports 2026-06-22Latest test date< 1 year COA history 10% underdosed0% low purity 68 0
Lab evidence
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196 goldenlabs Explore test results Seller type not reviewed No buyer reviews indexed 68Unique reports 2023-05-24Latest test date6+ years COA history 22% underdosed 0 68
Lab evidence
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201 ChainLynk Aminos Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-10-15Latest test date< 1 year COA history 7% underdosed2% low purity 43 24
Lab evidence
Free previewExplore this vendor’s lab reports
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205 Vialora Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-10-02Latest test date< 1 year COA history 2% underdosed0% low purity 31 36
Lab evidence
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203 Pretty Packs Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-09-30Latest test date< 1 year COA history 0% underdosed0% low purity 34 33
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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199 Miami BioTides Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-09-24Latest test date1+ year COA history 0% underdosed0% low purity 51 16
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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202 Forge Amino LLC Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-09-21Latest test date< 1 year COA history 0% underdosed0% low purity 42 25
Lab evidence
Free previewExplore this vendor’s lab reports
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204 NODEX Corp Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-09-19Latest test date< 1 year COA history 0% underdosed0% low purity 32 35
Lab evidence
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200 Certified Peptides Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-09-10Latest test date1+ year COA history 0% low purity 49 18
Lab evidence
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198 Elite Aminos LLC Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-04-23Latest test date1+ year COA history 8% underdosed0% low purity 66 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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197 PNH Explore test results Seller type not reviewed No buyer reviews indexed 67Unique reports 2026-02-14Latest test date< 1 year COA history 4% underdosed3% low purity 67 0
Lab evidence
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208 Preferred Rxx Explore test results Seller type not reviewed No buyer reviews indexed 66Unique reports 2026-10-17Latest test date< 1 year COA history 2% underdosed0% low purity 5 61
Lab evidence
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207 Offline Peptides Explore test results Seller type not reviewed No buyer reviews indexed 66Unique reports 2026-10-09Latest test date< 1 year COA history 4% underdosed2% low purity 39 27
Lab evidence
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206 His & Hers Explore test results Seller type not reviewed No buyer reviews indexed 66Unique reports 2026-05-27Latest test date1+ year COA history 0% underdosed4% low purity 66 0
Lab evidence
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More reports means more evidence to inspect, not better quality. Each report counts once. Purity and amount percentages require at least five applicable results; explicit endotoxin failures are always shown. Missing measurements are not passes.
Understand the coverage
- Published COA report entries
- 120,981
- 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 · 17,266 unique reports · 41 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 · 57,121 unique reports · 363 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.