Free Bacteriostatic Water with Qualifying Peptide Orders
Every peptide vial you order from MyGLP1Store ships with one free 10mL vial of bacteriostatic water — the preserved diluent used to reconstitute lyophilized research peptides. Most suppliers either charge for it or leave you to source it yourself. We include it. New to the category? See our GLP-1 research peptides guide and the step-by-step reconstitution guide.
Veteran-owned. Third-party lab-tested. Fast U.S. fulfilment. For laboratory and research use only — not for human consumption.
Free with every peptide vial · Sterile & preserved · Third-party tested · Ships from the US
How the free BAC water offer works
- What qualifies: every order containing a lyophilized peptide vial from the retail catalogue.
- What you get: one sealed 10mL vial of bacteriostatic water, included with the order at no charge.
- Bulk and wholesale kits: bacteriostatic water is included under the same policy — see each kit listing for what ships in the box.
- Need more? Additional single vials and multi-vial packs are sold separately on the BAC water product page.
Need extra BAC water? Buy additional 10mL vials →
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-use research vials: once a sealed vial is entered, the bacteriostatic agent helps keep the solution stable across repeated draws, 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. Divide the peptide’s milligram amount by your protocol’s target concentration (mg/mL) to get the volume to add, or use the reconstitution calculator. The Bacteriostatic Water for Peptides Guide covers concentration, storage and shelf life in detail.
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 competitive standalone price. It is a better deal for you, and it is how we earn repeat researchers instead of one-time orders.
Storage and handling
Store sealed vials at room temperature away from direct light; refrigerate prepared peptide solutions per your protocol. Always use sterile technique when entering a vial. After-opening handling depends on the product label and your laboratory procedure. 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 one free 10mL vial of bacteriostatic water. If you need more, additional vials and packs are sold on the BAC water product page.
Does the free vial show in my cart?
The free vial is added to qualifying orders when they are packed, so it may not appear as a separate cart line. It ships in the same box as your peptides.
What is bacteriostatic water used for?
In research, it is the preserved diluent used to reconstitute lyophilized peptides into solution. The 0.9% benzyl alcohol preservative makes it suitable for multi-use vials accessed more than once.
Bacteriostatic water vs. sterile water — what is the difference?
Sterile water has no preservative and is intended for single use. Bacteriostatic water contains a bacteria-inhibiting preservative, which is why it is preferred for vials that will be accessed repeatedly.
Does bacteriostatic water need to be refrigerated?
An unopened bacteriostatic water vial is stored at controlled room temperature, away from direct light — refrigeration is not required. Reconstituted peptide solutions are a different matter and are typically kept refrigerated per protocol. Always follow your lab’s handling procedures.
Where can I buy extra bacteriostatic water?
Directly from the BAC water product page — single 10mL vials, or 3- and 10-vial packs, shipped from the US.
For laboratory and research use only. Not for human consumption.