What needle gauge do you use for peptides?

This site does not sell products and does not recommend a specific needle. Gauge is diameter, and the numbers run backwards: a higher gauge is a thinner needle. Insulin syringes are commonly sold in the 28 to 31 gauge range, which is thin enough that diameter is rarely the comfort limit. Length is the more consequential number, because it decides whether the injection stays in fat or reaches muscle. 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.