API
Also known as Active Pharmaceutical Ingredient
The biologically active component of a medication — the specific peptide itself, before formulation.
Definition
Active Pharmaceutical Ingredient is the bulk substance responsible for the drug's clinical effect — the peptide sequence itself, prior to being combined with buffers, stabilisers and packaging. For compounded peptides, API sourcing is a major quality determinant: FDA-registered API suppliers follow identity and purity standards that "research-grade" vendors do not.
Disclaimer: Peptide therapy is a prescription medical service. Results vary. Not a substitute for emergency care.
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Compounded Peptide
A peptide prepared for an individual patient by a licensed compounding pharmacy, prescribed by a clinician and tested for identity, potency and contamination.
Pharmacy & RegulationcGMPCurrent Good Manufacturing Practice
FDA-enforced manufacturing standards for pharmaceutical products. 503A compounders operate under USP 795/797 standards rather than full cGMP.
SafetyResearch Chemical
Unregulated peptides sold online labelled 'not for human use' — not a legitimate prescription pathway and not tested for patient safety.
$149 panel.
A clinician reads it in 24 hours.
Order the Peptide Readiness Panel, draw at a Quest or LabCorp near you, and your clinician sends back a matched protocol with a confidence score.