Intramuscular Injection
Also known as IM Injection
Injection into muscle tissue — faster absorption than subcutaneous, used for specific peptides and hormone therapies.
Definition
Intramuscular injection places the dose into skeletal muscle — typically deltoid, vastus lateralis or gluteal muscle. Absorption is faster than subcutaneous but delivers a sharper peak. For most peptides, subcutaneous is preferred for its steady absorption curve; IM is used for specific agents (cerebrolysin, some hormone therapies) where the pharmacokinetics match.
Read More
Subcutaneous InjectionSQ Injection
Injection into the fatty layer just below the skin — the standard route for peptide dosing, self-administered with an insulin syringe.
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.
Delivery & DosingInsulin Syringe
The 30–31-gauge syringe calibrated in insulin units — the standard tool for subcutaneous peptide self-injection.
$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.