Does bacteriostatic water make a multi-use vial safe forever?

No. The roughly 28-day window in the fridge is how long the preservative is known to hold back germs. It does not promise the vial is germ-free after that, and it does not replace wiping the top, using a new needle, or never sharing the vial. After that window, the risk of germs goes up, even in the fridge. A given peptide may also break down sooner than the preservative window. 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.