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Directory · Regional · 369 suppliers

Research peptide suppliers for the US

Suppliers whose recorded business location is in the US, or who state that they ship there. Location and shipping countries come from the supplier's own published information, and are shown with their source on each profile. Rules on buying and importing these products differ by country; in United States the regulator is the U.S. Food and Drug Administration (FDA). We give no advice on legality or use.

Index updated 8 Nov 2026 · 11 verified · 283 state third-party testing · 275 with a COA page

Where suppliers are basedUnited States
Based in the US (301)Ship in from elsewhere (68)

Of 369 suppliers serving the US, 301 are based there and 68 ship in from abroad. 283 state third-party testing and 275 link a certificate of analysis page. 11 have passed PepFinder verification. Stores based in the US are listed before those shipping in, whatever their score.

Based in the US (301)

  14. Peptide Sciences logo
    #194

    Peptide Sciences

    US based

    United States

    5.9
    66 products · Delivery Domestic orders typically arrive within 3 to 5 business days.
    Third-party testing statedCOA page linked, not reviewedCrypto
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  19. Peptide Pros logo
    #199

    Peptide Pros

    US based

    United States

    5.9
    107 products · Delivery We ask you allow up to 14 days for domestic and 45 days for international orders for delivery to ensure your parcel has not simply been delayed – especially since Covid creates some delays in certain
    Third-party testing statedCOA page linked, not reviewedCard
    View reviewVisit store

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  34. #214

    Stack Research

    US based

    United States

    5.8
    17 products · Delivery Report visible damage, an incorrect or missing item, a seal or labeling problem, or a supported product-specific temperature concern in writing within 48 hours after the carrier’s delivery scan.
    COA page linked, not reviewedCardCrypto
    View reviewVisit store

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Buying research peptides in the US

Suppliers appear here because they are based in the US or state that they ship there. Prices are compared in USD only, never converted from other currencies, so the figures reflect what buyers in the US actually pay. Rules on buying, importing and possessing research peptides are set nationally, and the regulator in United States is the U.S. Food and Drug Administration (FDA): our page on whether peptides are legal in the US summarises them, with links to the sources.

To compare prices for one peptide in USD, go straight to BPC-157, Retatrutide, Tirzepatide, Semaglutide, Tesamorelin, GHK-Cu, Ipamorelin or Sermorelin. Before ordering from a supplier you have not used, run through our checklist for spotting an unreliable supplier, and check whether it publishes independent test results. The best-rated and fastest delivery rankings cover every region.