Should peptides be injected subcutaneously or intramuscularly?

Every compound on this site sold to individuals is described, on the vendor material and in the community protocols people actually follow, as a subcutaneous injection drawn on an insulin syringe, which is also what this site's reconstitution calculator assumes. Subcutaneous means under the skin into the fat layer, not into muscle. No published human trial has compared the two routes for any compound this site tracks.

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of injecting: sites, needles and safety. Subcutaneous vs intramuscular, where people inject, rotation and lipohypertrophy, needle gauge, aseptic technique, why it stings, and sharps disposal. Full walkthrough at /injecting.