Subcutaneous (SubQ)

Last updated August 2026

An injection into the fatty layer just under the skin — the most common route for research peptides, typically with a short insulin needle.

The fatty layer under the skin has relatively few blood vessels, which slows absorption and suits peptides intended to act gradually. Common sites include the abdomen a couple of inches from the navel and the outer thigh, rotated between injections to spare any one spot. Because the tissue accepts only small volumes comfortably, choosing a concentration that keeps the draw modest is a practical consideration when reconstituting.

Educational reference only — not medical advice. Always follow the guidance of a qualified healthcare professional.