Pharmacokinetics
Also known as PK
What the body does to a drug — absorption, distribution, metabolism and excretion. The science of dose-to-plasma-level relationships.
Definition
Pharmacokinetics describes the movement of a drug through the body across four phases: absorption from the injection or administration site, distribution into tissues, metabolism by liver enzymes or peptidases, and excretion via kidneys or other routes. For peptides, PK is heavily modified — lyophilisation, fatty-acid conjugation and sequence stabilisation are all PK engineering.
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PharmacodynamicsPD
What a drug does to the body — the receptor binding and downstream signalling that produce the clinical effect.
MechanismHalf-Lifet½
The time required for a drug's plasma concentration to drop by half — a key determinant of dosing frequency.
Delivery & DosingBioavailability
The fraction of a dose that reaches circulation in active form — a key reason most peptides are injected subcutaneously rather than taken orally.
$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.