Trusted peptide vendors & supplies

A curated starting point for research peptides and the supplies you need to mix, store, and handle them safely. Always verify testing, shipping, and legal status before you buy.

Recommended vendors

Nexaph logo

Nexaph

Peptides & research compounds

Carries research peptides and related lab supplies with clear product pages.

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Modified Aminos logo

Modified Aminos

Peptides & aminos

Wide catalog of amino acid and peptide products commonly used in research.

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ReadyPep logo

ReadyPep

Peptides

European-focused source with straightforward product listings and shipping info.

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Penguin Peptides logo

Penguin Peptides

Peptides

US-based vendor frequently mentioned in research communities.

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Peplair Research logo

Peplair Research

Research peptides

Research-focused catalog with transparent COA and quality claims.

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Other reputable vendors to consider

These names come up frequently in research communities. Compare them on the same criteria before ordering.

  • Peptide Sciences logo

    Peptide Sciences

    Long-running US vendor known for publishing third-party testing.

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  • Biotech Peptides logo

    Biotech Peptides

    Offers peptides and research compounds with bundle options.

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  • Sports Technology Labs logo

    Sports Technology Labs

    Emphasizes analytical certificates and independent quality control.

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  • Core Peptides logo

    Core Peptides

    Research peptide vendor with loyalty programs and subscription plans.

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  • Amino Asylum

    Stocks amino acids and peptides commonly discussed in research settings.

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What to look for in any vendor

  • Lot-specific COAs

    The certificate should name the exact lot on your vial, not a generic sample from last year.

  • Independent third-party testing

    Look for labs that publish results from an outside analytical service, not just in-house claims.

  • Cold-chain shipping

    Peptides are sensitive to heat; insulated packaging and ice packs matter for quality on arrival.

  • Clear labeling

    Every vial should list the peptide name, mg per vial, lot number, and storage instructions.

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Peppy is a tracking and educational tool, not a pharmacy or medical advisor. The links above are provided for research convenience only. Many peptides are not approved for human use in all jurisdictions. Always check local laws, review current certificates of analysis, and work with a licensed clinician before using any peptide.