Bacteriostatic Water for Peptides
Bacteriostatic water is sterile water with 0.9% benzyl alcohol added as a preservative — the standard diluent for reconstituting lyophilized (freeze-dried) research peptides. The benzyl alcohol lets a reconstituted vial be drawn from repeatedly over ~28 days without bacterial growth, which plain sterile water and saline don't allow. Below: the fundamentals, how much to use per vial, storage and shelf life, and step-by-step reconstitution guides for every peptide we cover.
Bacteriostatic Water Basics
What Is Bacteriostatic Water? Uses, Safety & Storage
One ingredient separates bacteriostatic water from sterile water — and that ingredient is the entire reason multi-dose peptide vials work.
Bac Water vs Sterile Water vs Saline: What to Use
Three injectable waters look identical, behave differently. One is wrong for multi-dose peptide vials — and one is wrong for peptides entirely.
How Much Bac Water Per Peptide Vial: Chart + Math
One reconstitution ratio gets the math right every time. Full chart for BPC-157, TB-500, GHK-Cu, semaglutide, tirzepatide, and retatrutide.
How Long Is Bac Water Good For? 28-Day Rule
28 days once opened and refrigerated — but three things shorten that. How to tell if a vial has gone bad, and what unopened shelf life really means.
Where to Buy Bacteriostatic Water for Peptides
Three ways to buy bac water for peptides — vendor-sourced, pharmacy, or marketplace. Typical 30 mL runs $20-35. Which path gives you COA-verified quality without ruining a $300 vial.
Can You Make Bacteriostatic Water at Home? Risks
The DIY recipe is simple. The risks aren't. Why homemade bac water fails sterility, concentration, and pyrogen tests that take 30 seconds to buy around.
Bac Water for GLP-1 Reconstitution: Sema, Tirz, Reta
Three GLP-1 compounds, three vial sizes, one bac water ratio that works. Why multi-month protocols make bac water non-negotiable.
Cloudy Peptide After Reconstitution: Safe to Inject?
Cloudy after mixing? Almost always the bac water — not the peptide. Whether it's safe to inject, the 7 causes ranked, and how to prevent it.
Reconstitution Guides by Peptide
Exact BAC water volume, concentration, and syringe-unit math for each peptide.
