BAC Water 101: Stop wasting it! Here's how to properly store and reuse your Bacteriostatic Water for peptides. Keep it clean. Keep it cold. Keep making progress. Tag someone who needs this When she found the BAC water in the fridge., happens to every gymbro eventually. you got the 28 day rule down, the slin pins are organized, the BPC vial is finally swirled (not shaken). then she opens How to Store Bacteriostatic Water Safely Confused about whether BAC water needs refrigeration after opening? According to USP standards and Pfizer's own guidance, both room temp (2025C) and refrigeration are acceptable B12 MIC Injection