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.

7,309 lab results30 vendors in the report-count rankingHow the rankings work →

Data refreshed Report dates are shown with each test.

International vendors

Underfilled samples

Counts valid quantity results at least 10% below the stated amount. Tests can compare against different claims; inspect the original report before comparing individual products.

Across international vendors in this comparison

563 recorded failures across 5,943 applicable results from 30 vendors.

1,366 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 46failures / 328 tests 14%share of tests · 3 sources 2026-09-18latest lab result

    Lab evidence

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    46 failures in 328 applicable results from this vendor

    RetatrutideExplore failed COAs11 / 98 failures / results
    • At least 10% short 11

    Largest measured shortfall 88.8%

    BPC-157Explore failed COAs7 / 16 failures / results
    • At least 10% short 7

    Largest measured shortfall 26.9%

    TesamorelinExplore failed COAs6 / 28 failures / results
    • At least 10% short 6

    Largest measured shortfall 49.5%

    GHK-CuExplore failed COAs6 / 13 failures / results
    • At least 10% short 6

    Largest measured shortfall 23%

    TirzepatideExplore failed COAs4 / 76 failures / results
    • At least 10% short 4

    Largest measured shortfall 59.7%

    Explore all 13 compounds with failures

    Showing 5 of 13 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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  2. 02 Vendor name available with ProExplore test results 43failures / 283 tests 15.2%share of tests · 2 sources 2026-10-12latest lab result

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    43 failures in 283 applicable results from this vendor

    RetatrutideExplore failed COAs12 / 80 failures / results
    • At least 10% short 12

    Largest measured shortfall 45.5%

    TirzepatideExplore failed COAs8 / 53 failures / results
    • At least 10% short 8

    Largest measured shortfall 67.9%

    GHK-CuExplore failed COAs6 / 24 failures / results
    • At least 10% short 6

    Largest measured shortfall 43.3%

    TesamorelinExplore failed COAs5 / 27 failures / results
    • At least 10% short 5

    Largest measured shortfall 49.3%

    CagrilintideExplore failed COAs4 / 14 failures / results
    • At least 10% short 4

    Largest measured shortfall 14%

    Explore all 11 compounds with failures

    Showing 5 of 11 compound groups with failures. 23 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 41failures / 378 tests 10.8%share of tests · 3 sources 2026-10-09latest lab result

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    41 failures in 378 applicable results from this vendor

    RetatrutideExplore failed COAs10 / 129 failures / results
    • At least 10% short 10

    Largest measured shortfall 55%

    GHK-CuExplore failed COAs10 / 38 failures / results
    • At least 10% short 10

    Largest measured shortfall 40.4%

    TesamorelinExplore failed COAs5 / 24 failures / results
    • At least 10% short 5

    Largest measured shortfall 53%

    TirzepatideExplore failed COAs3 / 50 failures / results
    • At least 10% short 3

    Largest measured shortfall 27.8%

    BPC-157Explore failed COAs2 / 35 failures / results
    • At least 10% short 2

    Largest measured shortfall 20.9%

    Explore all 13 compounds with failures

    Showing 5 of 13 compound groups with failures. 8 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 41failures / 337 tests 12.2%share of tests · 4 sources 2026-10-12latest lab result

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    41 failures in 337 applicable results from this vendor

    RetatrutideExplore failed COAs9 / 114 failures / results
    • At least 10% short 9

    Largest measured shortfall 65.7%

    TirzepatideExplore failed COAs7 / 106 failures / results
    • At least 10% short 7

    Largest measured shortfall 59.6%

    SemaglutideExplore failed COAs6 / 14 failures / results
    • At least 10% short 6

    Largest measured shortfall 41.9%

    GHK-CuExplore failed COAs5 / 19 failures / results
    • At least 10% short 5

    Largest measured shortfall 27.5%

    NAD+Explore failed COAs4 / 7 failures / results
    • At least 10% short 4

    Largest measured shortfall 40.6%

    Explore all 11 compounds with failures

    Showing 5 of 11 compound groups with failures. 14 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 41failures / 327 tests 12.5%share of tests · 2 sources 2026-10-12latest lab result

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    41 failures in 327 applicable results from this vendor

    GHK-CuExplore failed COAs18 / 26 failures / results
    • At least 10% short 18

    Largest measured shortfall 30.6%

    RetatrutideExplore failed COAs10 / 151 failures / results
    • At least 10% short 10

    Largest measured shortfall 52.5%

    BPC-157Explore failed COAs4 / 23 failures / results
    • At least 10% short 4

    Largest measured shortfall 10.9%

    TesamorelinExplore failed COAs2 / 24 failures / results
    • At least 10% short 2

    Largest measured shortfall 23.33%

    TB-500Explore failed COAs2 / 15 failures / results
    • At least 10% short 2

    Largest measured shortfall 50.3%

    Explore all 10 compounds with failures

    Showing 5 of 10 compound groups with failures. 20 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 35failures / 173 tests 20.2%share of tests · 1 source 2026-10-08latest lab result

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    35 failures in 173 applicable results from this vendor

    RetatrutideExplore failed COAs11 / 64 failures / results
    • At least 10% short 11

    Largest measured shortfall 65.2%

    GHK-CuExplore failed COAs7 / 22 failures / results
    • At least 10% short 7

    Largest measured shortfall 56.3%

    BPC-157Explore failed COAs6 / 13 failures / results
    • At least 10% short 6

    Largest measured shortfall 60.2%

    TesamorelinExplore failed COAs4 / 16 failures / results
    • At least 10% short 4

    Largest measured shortfall 46%

    TirzepatideExplore failed COAs2 / 32 failures / results
    • At least 10% short 2

    Largest measured shortfall 17.3%

    Explore all 8 compounds with failures

    Showing 5 of 8 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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  7. 07 Vendor name available with ProExplore test results 30failures / 497 tests 6%share of tests · 3 sources 2026-10-12latest lab result

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    30 failures in 497 applicable results from this vendor

    RetatrutideExplore failed COAs8 / 146 failures / results
    • At least 10% short 8

    Largest measured shortfall 56.6%

    TirzepatideExplore failed COAs7 / 133 failures / results
    • At least 10% short 7

    Largest measured shortfall 44%

    TesamorelinExplore failed COAs5 / 34 failures / results
    • At least 10% short 5

    Largest measured shortfall 45.4%

    GHK-CuExplore failed COAs4 / 54 failures / results
    • At least 10% short 4

    Largest measured shortfall 16.2%

    SermorelinExplore failed COAs3 / 5 failures / results
    • At least 10% short 3

    Largest measured shortfall 49.7%

    Explore all 8 compounds with failures

    Showing 5 of 8 compound groups with failures. 39 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 25failures / 193 tests 13%share of tests · 3 sources 2026-10-14latest lab result

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    25 failures in 193 applicable results from this vendor

    RetatrutideExplore failed COAs9 / 61 failures / results
    • At least 10% short 9

    Largest measured shortfall 36%

    GHK-CuExplore failed COAs7 / 22 failures / results
    • At least 10% short 7

    Largest measured shortfall 60%

    TirzepatideExplore failed COAs3 / 31 failures / results
    • At least 10% short 3

    Largest measured shortfall 51.7%

    BPC-157Explore failed COAs1 / 13 failures / results
    • At least 10% short 1

    Largest measured shortfall 12.2%

    TesamorelinExplore failed COAs1 / 7 failures / results
    • At least 10% short 1

    Largest measured shortfall 15.5%

    Explore all 9 compounds with failures

    Showing 5 of 9 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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  9. 09 Vendor name available with ProExplore test results 25failures / 171 tests 14.6%share of tests · 2 sources 2026-10-14latest lab result

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    25 failures in 171 applicable results from this vendor

    RetatrutideExplore failed COAs9 / 65 failures / results
    • At least 10% short 9

    Largest measured shortfall 49.5%

    GHK-CuExplore failed COAs5 / 15 failures / results
    • At least 10% short 5

    Largest measured shortfall 64%

    TesamorelinExplore failed COAs4 / 13 failures / results
    • At least 10% short 4

    Largest measured shortfall 67.6%

    BPC-157Explore failed COAs3 / 10 failures / results
    • At least 10% short 3

    Largest measured shortfall 26.4%

    HGHExplore failed COAs2 / 7 failures / results
    • At least 10% short 2

    Largest measured shortfall 34.7%

    Explore all 7 compounds with failures

    Showing 5 of 7 compound groups with failures. 25 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 24failures / 954 tests 2.5%share of tests · 5 sources 2026-09-21latest lab result

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    24 failures in 954 applicable results from this vendor

    RetatrutideExplore failed COAs5 / 107 failures / results
    • At least 10% short 5

    Largest measured shortfall 71.08%

    Other compoundsExplore failed COAs4 / 161 failures / results
    • At least 10% short 4

    Largest measured shortfall 15.4%

    TirzepatideExplore failed COAs4 / 98 failures / results
    • At least 10% short 4

    Largest measured shortfall 28.7%

    BPC-157Explore failed COAs4 / 51 failures / results
    • At least 10% short 4

    Largest measured shortfall 15.6%

    GHK-CuExplore failed COAs3 / 44 failures / results
    • At least 10% short 3

    Largest measured shortfall 44.6%

    Explore all 9 compounds with failures

    Showing 5 of 9 compound groups with failures. 351 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 →