What is Bac Water? Bacteriostatic Water (BAC Water) is sterile water that contains 0.9% benzyl alcohol, which helps prevent bacterial growth. Used in research and laboratory settings for reconstitution and dilution. Visit Retatrutide 10mg Dosing PHARMAHALL Here is how you reconstitute any peptide There is no universal formula for reconstituting peptides. The amount of bacteriostatic water you use depends on the peptide, the dose you're running, and how Peptide Dosage Calculator (Reconstitution)