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99%+ purity, independently verified

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Peptides are signals.
Ours are the ones you can trust.

Know exactly what is in the vial. Every batch is tested by a named third-party lab and traceable to a public certificate of analysis.

For research use only. Not for human or veterinary use.

Why Signal

  • Proof, not promises

    Every batch is tested by a named third-party lab. 99%+ purity by HPLC, identity confirmed by mass spectrometry, net peptide content disclosed, and a public COA you can look up by batch number.

  • Shipped from the USA

    No customs risk and no long waits. Orders placed before noon Pacific ship the same day by USPS Priority, at your bench in about three days. Free shipping over $200.

  • Effortless to order

    A clean, familiar checkout with multiple payment options. Real people ready to answer questions about products, testing, or an order, anytime.

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For research use only. Not for human or veterinary use.