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 Bacteriostatic Water Power Peptides I get asked questions about this subject a lot. Here's a simple explanation: If you have a 10mg vial of Retatrutide: If you add 1cc (100 units) of water.. Each .1 (10 Is it true that bac water has life of 30 days after 1st used then toss out??? Or is this stuff still usable ?? : r Retatrutide Hospira BAC water is designed specifically for reconstituting peptides. The bacteriostatic agent (0.9% benzyl alcohol) helps inhibit bacterial growth, allowing for safe multi dose use. Quality matters here. Using a trusted, medical grade product