Intramuscular (IM)

Last updated August 2026

An injection into muscle tissue, deeper than subcutaneous. Less common for research peptides, which are typically subcutaneous.

Intramuscular injections reach deeper tissue than subcutaneous ones and generally use a longer needle, but the route does not alter the reconstitution math itself. The same vial concentration and the same number of units apply whether a dose is placed into muscle or under the skin; the choice of route is about absorption and comfort, not about how the dose is calculated.

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