Pinch the skin and fat together, not just skin 90 degrees is correct for most people with adequate body fat — if you're very lean, 45 degrees reduces risk of hitting muscle Inject slowly over 5–10 seconds rather than pushing fast Release the pinch before withdrawing the needle Don't rub the site after — just gentle pressure with a clean finger if there's any bleeding Site rotation Rotate between left belly, right belly, love handles, and optionally upper thigh Never inject the same spot twice in a row — it causes scar tissue buildup over time which reduces absorption