Safe subcutaneous injection technique for peptides. Injection sites, needle selection, sterile protocol, and post-injection care.
Use soap and warm water for at least 20 seconds. Dry with a clean towel. This is the single most important step for preventing infection.
Gather: insulin syringe (U-40 recommended for peptides), alcohol swabs, reconstituted peptide vial, and a sharps container for disposal.
Wipe the vial stopper with alcohol. Insert needle, invert vial, and draw the calculated number of units. Remove air bubbles by tapping the syringe gently and pushing the plunger slightly.
Common subcutaneous sites: abdomen (2 inches from navel), front of thighs, or back of upper arms. Rotate injection sites to prevent lipodystrophy.
Wipe the injection area with an alcohol swab in a circular motion from center outward. Allow to air dry completely — injecting through wet alcohol causes stinging.
Pinch a fold of skin. Insert the needle at a 45-90° angle (90° for thin needles like 31G). Inject slowly and steadily. Wait 5 seconds before withdrawing the needle.
Apply light pressure with a cotton ball if there is any bleeding. Do not rub the site. Dispose of the needle in a sharps container immediately — never recap needles.
For subcutaneous peptide injections, 29-31 gauge needles (insulin syringes) are standard. The higher the gauge, the thinner the needle. 31G is virtually painless for most people. U-40 syringes are preferred for peptide dosing as the markings align well with common dose calculations.
Divide your abdomen into quadrants and rotate between them. If using thighs, alternate between left and right, and vary the exact location each time. This prevents tissue damage and ensures consistent absorption.
GH secretagogues (Ipamorelin, CJC-1295): inject on an empty stomach, ideally before bed. BPC-157: can be injected near the injury site for localized effects. GLP-1 agonists: once-weekly injections at the same time each week.
Disclaimer: This guide is for educational purposes only. Always follow sterile procedures and consult a healthcare provider.