Bacteriostatic Water

Every peptide vial you order from MyGLP1Store ships with free bacteriostatic water — the sterile diluent you need to reconstitute lyophilized research peptides. Most suppliers either charge for it or leave you to source it yourself. We include it free, along with the free research tools you need to work accurately, including our reconstitution calculator. New to the category? See our GLP-1 research peptides guide and the step-by-step reconstitution guide. Need extra, or just buying water? We also sell bacteriostatic water on its own at the lowest price we’ve found online.

Veteran-owned. Third-party lab-tested. Same-day U.S. shipping. For laboratory and research use only — not for human consumption.

Free with every vial · Lowest standalone price · Sterile & preserved · COA on file · Same-day shipping

What is bacteriostatic water?

Bacteriostatic water is sterile water that contains a small amount of preservative — 0.9% benzyl alcohol — which suppresses the growth of bacteria. That preservative is what makes it suitable for multi-dose research vials: once a sealed vial is entered, the bacteriostatic agent helps keep the solution stable across repeated draws over a period of days, where plain sterile water has no such protection. In a research setting it is the standard diluent for reconstituting lyophilized (freeze-dried) peptides into a usable solution.

Why peptides need it for reconstitution

Research peptides ship as a lyophilized powder to keep them stable in transit. Before they can be used in the lab they have to be reconstituted — dissolved back into liquid with a sterile diluent. Bacteriostatic water is preferred over plain sterile water for any vial that will be accessed more than once, because the preservative protects the prepared solution between uses. Get the diluent wrong and you compromise the integrity of the sample — which is exactly why we do not make you hunt for it or pay extra.

How much bacteriostatic water per vial?

The amount of diluent you add determines the concentration of your reconstituted solution — more water means a lower concentration per unit volume, less water means a higher one. The right volume depends on the peptide’s milligram amount and the concentration your protocol calls for. Rather than guess, use our free reconstitution calculator: enter the vial’s mg and your target concentration and it returns the exact volume of bacteriostatic water to add.

Why we give it away

A researcher should not have to pay three different vendors to run one study. The peptide, the water to reconstitute it, and the tools to do it accurately are all part of the same job — so we bundle them. Free bacteriostatic water with every vial, free research tools, and if you need water on its own, a price lower than anywhere we have found. It is a better deal for you, and it is how we earn repeat researchers instead of one-time orders.

Buy bacteriostatic water on its own

Need extra vials, or stocking up? Our 10mL bacteriostatic water is sterile, preserved with 0.9% benzyl alcohol, and priced lower than anywhere we have found online.

Storage and handling

Store vials at room temperature away from direct light; refrigerate prepared peptide solutions per your protocol. Always use sterile technique when entering a vial. For laboratory and research use only. Not for human consumption.

Frequently asked questions

Is bacteriostatic water really free?

Yes — every peptide vial order from MyGLP1Store includes free bacteriostatic water. If you need additional water beyond what your order includes, you can add it at the lowest standalone price we have found online.

What is bacteriostatic water used for?

In research, it is the sterile diluent used to reconstitute lyophilized peptides into solution. The 0.9% benzyl alcohol preservative makes it suitable for multi-dose vials accessed more than once.