Injection Technique

Subcutaneous (SubQ) injection#

Most peptides are injected subcutaneously — into the fatty tissue just below the skin. Common sites: abdomen (2 inches from navel), upper thigh, and upper arm. Use a 29-31 gauge, 1/2 inch insulin syringe. Pinch the skin, insert at a 45-90 degree angle, inject slowly, and hold for 5 seconds before withdrawing.

Intramuscular (IM) injection#

TRT and some other compounds are injected into muscle tissue. Common sites: ventrogluteal (hip), vastus lateralis (outer thigh), and deltoid (shoulder). Use a 25-27 gauge, 1-1.5 inch needle depending on body composition. No need to pinch — insert at 90 degrees into the muscle.

Site rotation#

Rotate injection sites systematically to prevent lipodystrophy (lumps or tissue changes) and reduce discomfort. For SubQ, rotate between left abdomen, right abdomen, left thigh, right thigh. For IM, alternate between left and right glute or thigh.

The app tracks your injection sites with each dose log. Review your calendar to ensure you're rotating properly.

Hygiene essentials#

Always wash hands before preparing injections. Swab vial tops and injection sites with alcohol wipes. Use a fresh needle for each injection — never reuse needles. Dispose of sharps in a proper sharps container, never in regular trash.