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Directory · Curated list · serving the US · 275 suppliers

Suppliers with certificates of analysis serving the US

Two kinds of supplier appear here, and each card says which. Some have certificates of analysis we hold and have reviewed: batch, laboratory and date as documented. Others link a certificates-of-analysis page on their website that we have not yet reviewed; for those, the COA is the supplier's own claim. Showing stores based in or shipping to the US, those based there first. Show all regions.

Index updated 8 Nov 2026 · 11 verified · 231 state third-party testing · 275 with a COA page

  1. Leo Research logo
    #61

    Leo Research

    US based

    United States

    6.9
    70 products · Delivery Please allow 48 hours for final delivery resolution. · Ships to 1 country
    Third-party testing statedCOA page linked, not reviewedCard

    We may earn a commission. How this works

  2. Xeno logo
    #62

    Xeno

    US based

    United States

    6.9
    3.3 Trustpilot(7)28 products
    Third-party testing statedCOA page linked, not reviewedCrypto

    We may earn a commission. How this works

  3. American Peptides logo

    United States

    6.8
    3.1 Trustpilot(13)93 products · Delivery delivered in 2–3 business days · Ships to 1 country
    Third-party testing statedCOA page linked, not reviewedCardCrypto

    We may earn a commission. How this works

  4. Vertex Labs logo
    #65

    Vertex Labs

    US based

    Miami, United States

    6.8
    4.2 Trustpilot(24)48 products · Delivery 3 · Ships to 1 country
    Third-party testing statedCOA page linked, not reviewed✓ Verified ownerCard

    We may earn a commission. How this works

  5. Synthro Lab logo
    #67

    Synthro Lab

    US based

    United States

    6.8
    16 products · Delivery Delivery typically takes 2–3 days.
    Third-party testing statedCOA page linked, not reviewedCardBank transferCrypto

    We may earn a commission. How this works

  6. #72

    OptimalPep

    US based

    United States

    6.7
    58 products · Delivery Orders ship via FedEx 2-Day or USPS Priority and usually arrive within 2–3 business days once scanned. · Ships to 36 countries
    Third-party testing statedCOA page linked, not reviewedCard

    We may earn a commission. How this works

  7. Ascension Peptides logo

    United States

    6.7
    4.8 Trustpilot(78)35 products · Delivery For USA deliveries, please allow 2–5 business days after payment is fully processed and released by your bank. · Ships to 1 country
    Third-party testing statedCOA page linked, not reviewedCard

    We may earn a commission. How this works

  8. QC Labs logo
    #78

    QC Labs

    US based

    TX, United States

    6.7
    14 products · Delivery 3–4 business days (1–2 days processing + FedEx 2 Day) · Ships to 1 country
    Third-party testing statedCOA page linked, not reviewed✓ Verified owner

    We may earn a commission. How this works

  9. #88

    Rainbow Peptide

    US based

    United States

    6.5
    41 products · Delivery Delivery to the UK is overnight and 2–3 day delivery available. · Ships to 7 countries
    Third-party testing statedCOA page linked, not reviewedCrypto

    We may earn a commission. How this works

  10. GLP1 Research Lab logo
    #103

    GLP1 Research Lab

    US based

    United States

    6.4
    17 products · Delivery Domestic (U.S.) delivery typically takes 2–5 business days after processing, depending on FedEx service level and destination.
    Third-party testing statedCOA page linked, not reviewedCardPayPal

    We may earn a commission. How this works

  11. Trusted Peptides logo
    #105

    Trusted Peptides

    US based

    United States

    6.4
    20 products · Delivery Free FedEx 2 days air shipment with Saturday delivery!.
    Third-party testing statedCOA page linked, not reviewedCard

    We may earn a commission. How this works

  12. LiveWell logo
    #108

    LiveWell

    US based

    United States

    6.4
    28 products · Ships to 36 countries
    Third-party testing statedCOA page linked, not reviewedCardBank transfer

    We may earn a commission. How this works