Peptide vendor lab results
Where lab tests
found problems.
Compare recorded test failures within each seller group. Counts show what was found in tested samples, not everything a vendor sells.
U.S.-based domestic resellers
Compound not found
Counts exact-zero identity results in the current comparison. It does not establish that a vial was empty, and it is not an ordinary 0% purity measurement.
Across domestic resellers in this comparison
35 recorded failures across 12,759 applicable results from 100 vendors.
2,846 other eligible records have no included result for this check. Missing and excluded measurements never count as passes.
Latest eligible report: 2026-09-01. Each row below shows one vendor’s own test history.
Open a vendor row to explore compounds and test failures. Reveal protected names with Pro.
01 Vendor identity hiddenExplore test results 17failures / 268 tests 6.3%share of tests · 3 sources 2026-08-03latest lab result
Inside the lab evidence
Public preview17 failures in 268 applicable results from this vendor
RetatrutideExplore failed COAs11 / 80 failures / results
- Compound not found 11
CJC-1295Explore failed COAs3 / 9 failures / results
- Compound not found 3
TesamorelinExplore failed COAs2 / 13 failures / results
- Compound not found 2
BPC-157Explore failed COAs1 / 22 failures / results
- Compound not found 1
4 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
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02 Vendor identity hiddenExplore test results 7failures / 570 tests 1.2%share of tests · 4 sources 2026-08-13latest lab result
Inside the lab evidence
Public preview7 failures in 570 applicable results from this vendor
IpamorelinExplore failed COAs2 / 21 failures / results
- Compound not found 2
RetatrutideExplore failed COAs1 / 155 failures / results
- Compound not found 1
TirzepatideExplore failed COAs1 / 120 failures / results
- Compound not found 1
TesamorelinExplore failed COAs1 / 40 failures / results
- Compound not found 1
BPC-157Explore failed COAs1 / 28 failures / results
- Compound not found 1
Explore all 6 compounds with failures
Showing 5 of 6 compound groups with failures. 132 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
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03 Peptide GurusExplore test results 2failures / 151 tests 1.3%share of tests · 2 sources 2026-09-01latest lab result
Inside the lab evidence
Public preview2 failures in 151 applicable results from this vendor
RetatrutideExplore failed COAs2 / 12 failures / results
- Compound not found 2
33 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
Read the evidence behind the summary.View vendorCheck the original reports, dates and tested batches.
04 Peptilab ResearchExplore test results 2failures / 14 tests 14.3%share of tests · 1 source 2025-05-20latest lab result
Inside the lab evidence
Public preview2 failures in 14 applicable results from this vendor
CJC-1295Explore failed COAs2 / 2 failures / results
- Compound not found 2
0 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
Read the evidence behind the summary.View vendorCheck the original reports, dates and tested batches.
05 Vendor identity hiddenExplore test results 1failures / 590 tests 0.2%share of tests · 2 sources 2026-08-30latest lab result
Inside the lab evidence
Public preview1 failure in 590 applicable results from this vendor
RetatrutideExplore failed COAs1 / 62 failures / results
- Compound not found 1
54 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
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06 Vendor identity hiddenExplore test results 1failures / 503 tests 0.2%share of tests · 4 sources 2026-08-23latest lab result
Inside the lab evidence
Public preview1 failure in 503 applicable results from this vendor
RetatrutideExplore failed COAs1 / 72 failures / results
- Compound not found 1
157 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
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07 Vendor identity hiddenExplore test results 1failures / 207 tests 0.5%share of tests · 3 sources 2026-08-27latest lab result
Inside the lab evidence
Public preview1 failure in 207 applicable results from this vendor
RetatrutideExplore failed COAs1 / 22 failures / results
- Compound not found 1
76 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
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08 Liberty PeptidesExplore test results 1failures / 82 tests 1.2%share of tests · 2 sources 2026-04-23latest lab result
Inside the lab evidence
Public preview1 failure in 82 applicable results from this vendor
CJC-1295Explore failed COAs1 / 5 failures / results
- Compound not found 1
49 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
Read the evidence behind the summary.View vendorCheck the original reports, dates and tested batches.
09 TOP — Top PeptideExplore test results 1failures / 69 tests 1.4%share of tests · 4 sources 2026-08-13latest lab result
Inside the lab evidence
Public preview1 failure in 69 applicable results from this vendor
TesamorelinExplore failed COAs1 / 4 failures / results
- Compound not found 1
7 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
Read the evidence behind the summary.View vendorCheck the original reports, dates and tested batches.
10 Prime PeptidesExplore test results 1failures / 65 tests 1.5%share of tests · 4 sources 2026-08-05latest lab result
Inside the lab evidence
Public preview1 failure in 65 applicable results from this vendor
CJC-1295Explore failed COAs1 / 2 failures / results
- Compound not found 1
16 other eligible records have no applicable result for this comparison. Includes reports with a checkable source and a usable result for this comparison. Results describe the submitted samples. Missing results never count as passes.
Read the evidence behind the summary.View vendorCheck the original reports, dates and tested batches.
Showing up to 10 vendors with at least 10 applicable results each. Ordered by the number of failed results, so heavily tested vendors may appear higher. Read the count and share together. Duplicate certificates are excluded. Missing tests never count as passes. Latest included report: 2026-09-01. Method and limitations →