Abdomen vs thigh vs arm for research peptides?

For research peptides, no published human trial ranks the belly against the thigh against the back of the upper arm, the spot people often call the deltoid. The fat layer does not change with the name on the vial. Ultrasound scans in adults found the fat was about 13.9 millimeters deep on average at the belly, 10.8 at the arm, and 10.4 at the thigh. That is why an 8 millimeter needle had the highest measured risk of hitting muscle at the thigh. The approved labels for similar weight-loss shots that found about the same amount reached the blood at those three spots describe those labeled products, not a research vial. This is not a dose. Full walkthrough at /injecting.

Full injecting guide: sites, needles, rotation, safety

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, site rotation, lipohypertrophy, needle length and gauge, vial hygiene at injection time, travel syringes, scar tissue, and when to stop and see a clinician. Full walkthrough at /injecting.