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.

7,306 lab results30 vendors in the report-count rankingHow the rankings work →

Data refreshed Report dates are shown with each test.

International vendors

Low purity results

Counts measured purity above 0% and below 97%. A result where the labeled compound was not found belongs in the identity category, not the purity average.

Across international vendors in this comparison

279 recorded failures across 6,297 applicable results from 30 vendors.

1,009 other eligible records have no included result for this check. Missing and excluded measurements never count as passes.

Latest eligible report: 2026-10-14. 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.

  1. 01 Vendor name available with ProExplore test results 56failures / 392 tests 14.3%share of tests · 4 sources 2026-10-06latest lab result

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    56 failures in 392 applicable results from this vendor

    Other compoundsExplore failed COAs34 / 81 failures / results
    • Purity below 97% 34

    Lowest measured purity 74.66%

    HGHExplore failed COAs13 / 17 failures / results
    • Purity below 97% 13

    Lowest measured purity 95.79%

    RetatrutideExplore failed COAs3 / 44 failures / results
    • Purity below 97% 3

    Lowest measured purity 89.04%

    CJC-1295Explore failed COAs3 / 9 failures / results
    • Purity below 97% 3

    Lowest measured purity 91.09%

    BPC-157Explore failed COAs2 / 19 failures / results
    • Purity below 97% 2

    Lowest measured purity 96.7%

    Explore all 6 compounds with failures

    Showing 5 of 6 compound groups with failures. 136 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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  2. 02 Vendor name available with ProExplore test results 29failures / 328 tests 8.8%share of tests · 3 sources 2026-09-18latest lab result

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    29 failures in 328 applicable results from this vendor

    TesamorelinExplore failed COAs6 / 28 failures / results
    • Purity below 97% 6

    Lowest measured purity 72.05%

    Other compoundsExplore failed COAs6 / 12 failures / results
    • Purity below 97% 6

    Lowest measured purity 94%

    BPC-157Explore failed COAs5 / 16 failures / results
    • Purity below 97% 5

    Lowest measured purity 81.61%

    HGHExplore failed COAs3 / 3 failures / results
    • Purity below 97% 3

    Lowest measured purity 94.59%

    RetatrutideExplore failed COAs2 / 98 failures / results
    • Purity below 97% 2

    Lowest measured purity 95.58%

    Explore all 10 compounds with failures

    Showing 5 of 10 compound groups with failures. 27 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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  3. 03 Vendor name available with ProExplore test results 22failures / 277 tests 7.9%share of tests · 2 sources 2026-10-12latest lab result

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    22 failures in 277 applicable results from this vendor

    TesamorelinExplore failed COAs6 / 28 failures / results
    • Purity below 97% 6

    Lowest measured purity 47.46%

    TB-500Explore failed COAs4 / 11 failures / results
    • Purity below 97% 4

    Lowest measured purity 87.23%

    CagrilintideExplore failed COAs3 / 14 failures / results
    • Purity below 97% 3

    Lowest measured purity 93.36%

    CJC-1295Explore failed COAs3 / 5 failures / results
    • Purity below 97% 3

    Lowest measured purity 83.95%

    RetatrutideExplore failed COAs2 / 80 failures / results
    • Purity below 97% 2

    Lowest measured purity 90.02%

    Explore all 9 compounds with failures

    Showing 5 of 9 compound groups with failures. 29 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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  4. 04 Vendor name available with ProExplore test results 21failures / 376 tests 5.6%share of tests · 3 sources 2026-10-09latest lab result

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    21 failures in 376 applicable results from this vendor

    TB-500Explore failed COAs7 / 15 failures / results
    • Purity below 97% 7

    Lowest measured purity 80.79%

    BPC-157Explore failed COAs6 / 35 failures / results
    • Purity below 97% 6

    Lowest measured purity 63.02%

    TesamorelinExplore failed COAs4 / 24 failures / results
    • Purity below 97% 4

    Lowest measured purity 72.47%

    RetatrutideExplore failed COAs1 / 129 failures / results
    • Purity below 97% 1

    Lowest measured purity 95.63%

    TirzepatideExplore failed COAs1 / 50 failures / results
    • Purity below 97% 1

    Lowest measured purity 96.14%

    Explore all 7 compounds with failures

    Showing 5 of 7 compound groups with failures. 10 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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  5. 05 Vendor name available with ProExplore test results 19failures / 330 tests 5.8%share of tests · 2 sources 2026-10-12latest lab result

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    19 failures in 330 applicable results from this vendor

    TB-500Explore failed COAs7 / 15 failures / results
    • Purity below 97% 7

    Lowest measured purity 53.7%

    RetatrutideExplore failed COAs3 / 151 failures / results
    • Purity below 97% 3

    Lowest measured purity 89.26%

    TesamorelinExplore failed COAs2 / 24 failures / results
    • Purity below 97% 2

    Lowest measured purity 51.3%

    BPC-157Explore failed COAs2 / 23 failures / results
    • Purity below 97% 2

    Lowest measured purity 96.23%

    IpamorelinExplore failed COAs1 / 10 failures / results
    • Purity below 97% 1

    Lowest measured purity 94.14%

    Explore all 9 compounds with failures

    Showing 5 of 9 compound groups with failures. 17 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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  6. 06 Vendor name available with ProExplore test results 13failures / 191 tests 6.8%share of tests · 3 sources 2026-10-14latest lab result

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    13 failures in 191 applicable results from this vendor

    HGHExplore failed COAs5 / 5 failures / results
    • Purity below 97% 5

    Lowest measured purity 95.56%

    TirzepatideExplore failed COAs2 / 31 failures / results
    • Purity below 97% 2

    Lowest measured purity 85.9%

    RetatrutideExplore failed COAs1 / 60 failures / results
    • Purity below 97% 1

    Lowest measured purity 90.3%

    GHK-CuExplore failed COAs1 / 22 failures / results
    • Purity below 97% 1

    Lowest measured purity 94.4%

    TesamorelinExplore failed COAs1 / 7 failures / results
    • Purity below 97% 1

    Lowest measured purity 95.1%

    Explore all 8 compounds with failures

    Showing 5 of 8 compound groups with failures. 11 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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  7. 07 Vendor name available with ProExplore test results 12failures / 1,011 tests 1.2%share of tests · 5 sources 2026-09-21latest lab result

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    12 failures in 1,011 applicable results from this vendor

    Other compoundsExplore failed COAs6 / 160 failures / results
    • Purity below 97% 6

    Lowest measured purity 29.46%

    SNAP-8Explore failed COAs2 / 10 failures / results
    • Purity below 97% 2

    Lowest measured purity 93.97%

    HGHExplore failed COAs2 / 7 failures / results
    • Purity below 97% 2

    Lowest measured purity 94.44%

    ARA-290Explore failed COAs1 / 9 failures / results
    • Purity below 97% 1

    Lowest measured purity 86.22%

    AdipotideExplore failed COAs1 / 3 failures / results
    • Purity below 97% 1

    Lowest measured purity 74.61%

    294 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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  8. 08 Vendor name available with ProExplore test results 11failures / 189 tests 5.8%share of tests · 3 sources 2026-10-14latest lab result

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    11 failures in 189 applicable results from this vendor

    RetatrutideExplore failed COAs3 / 60 failures / results
    • Purity below 97% 3

    Lowest measured purity 69.6%

    NAD+Explore failed COAs2 / 4 failures / results
    • Purity below 97% 2

    Lowest measured purity 88.5%

    GHK-CuExplore failed COAs1 / 16 failures / results
    • Purity below 97% 1

    Lowest measured purity 91.46%

    TesamorelinExplore failed COAs1 / 14 failures / results
    • Purity below 97% 1

    Lowest measured purity 93.92%

    BPC-157Explore failed COAs1 / 9 failures / results
    • Purity below 97% 1

    Lowest measured purity 95.81%

    Explore all 8 compounds with failures

    Showing 5 of 8 compound groups with failures. 19 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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  9. 09 Vendor name available with ProExplore test results 8failures / 499 tests 1.6%share of tests · 3 sources 2026-10-12latest lab result

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    8 failures in 499 applicable results from this vendor

    TirzepatideExplore failed COAs1 / 134 failures / results
    • Purity below 97% 1

    Lowest measured purity 75.9%

    IpamorelinExplore failed COAs1 / 16 failures / results
    • Purity below 97% 1

    Lowest measured purity 81.39%

    CagrilintideExplore failed COAs1 / 11 failures / results
    • Purity below 97% 1

    Lowest measured purity 93.84%

    TB-500Explore failed COAs1 / 11 failures / results
    • Purity below 97% 1

    Lowest measured purity 95.44%

    CJC-1295Explore failed COAs1 / 10 failures / results
    • Purity below 97% 1

    Lowest measured purity 94.34%

    Explore all 8 compounds with failures

    Showing 5 of 8 compound groups with failures. 37 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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  10. 10 Vendor name available with ProExplore test results 8failures / 144 tests 5.6%share of tests · 1 source 2026-10-09latest lab result

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    8 failures in 144 applicable results from this vendor

    BPC-157Explore failed COAs3 / 17 failures / results
    • Purity below 97% 3

    Lowest measured purity 84.6%

    CagrilintideExplore failed COAs2 / 7 failures / results
    • Purity below 97% 2

    Lowest measured purity 89.22%

    RetatrutideExplore failed COAs1 / 37 failures / results
    • Purity below 97% 1

    Lowest measured purity 95.3%

    TirzepatideExplore failed COAs1 / 31 failures / results
    • Purity below 97% 1

    Lowest measured purity 93.85%

    TB-500Explore failed COAs1 / 6 failures / results
    • Purity below 97% 1

    Lowest measured purity 96.16%

    2 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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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: 2026-10-14. Method and limitations →