Application Methods
A practitioner guide to the four main routes for research peptide administration — mechanisms, equipment, step-by-step protocols, and route-specific considerations.
Administration Routes
Choose the correct route for your research compound and protocol context
Subcutaneous Injection
The most widely used route for systemic peptide delivery in research protocols.
Intramuscular Injection
Direct delivery into muscle tissue for faster vascular uptake and rapid onset.
Intranasal Administration
Non-injection delivery via nasal mucosa — rapid brain and systemic uptake without needles.
Oral & Sublingual
Tablet, capsule, or sublingual delivery — limited to peptides with demonstrated oral bioactivity.
Route Selection Guide
Match the administration route to the peptide and research objective
| Route | Bioavailability | Onset | Pain | Best For |
|---|---|---|---|---|
| 💉 Subcutaneous Injection (SC) | 85–95% | 15–30 min | Low (29–31G needle) | BPC-157 TB-500 Semaglutide |
| 🩺 Intramuscular Injection (IM) | 90–100% | 10–20 min | Moderate (23–25G needle) | TB-500 GHRP-2 PT-141 |
| 🌬️ Intranasal Administration (IN) | 30–60% (peptide-dependent) | 5–15 min | None | Semax Selank PT-141 |
| 💊 Oral & Sublingual (PO/SL) | Oral: <5% (most peptides); Sublingual: 15–30% (select peptides) | 30–90 min (oral); 10–20 min (sublingual) | None | BPC-157 KPV |
Dosage Calculator
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Reconstitution protocols, storage requirements, and adverse event guidance for research peptides.
View Guidelines →Protocol Builder
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