How to Reconstitute Lyophilised Research Peptides
A clear laboratory guide to reconstituting lyophilised research peptides — what you need, the steps, and storage.
Research peptides are supplied as a lyophilised (freeze-dried) powder. Before use in laboratory work they are reconstituted — dissolved into a liquid. This is a general handling guide for researchers.
What you need
- The lyophilised peptide vial
- Bacteriostatic water (sterile water with 0.9% benzyl alcohol) for reconstitution
- A sterile syringe
- A clean, controlled laboratory workspace
Bacteriostatic water is the standard companion for reconstitution.
View Bacteriostatic WaterThe general process
Reconstitution involves drawing the bacteriostatic water into a syringe and adding it slowly to the peptide vial, letting the liquid run down the inside of the vial rather than directly onto the powder. The vial is then left to dissolve gently — not shaken — until the solution is clear.
Work out the concentration and volume to withdraw with our free calculator.
Open the peptide calculatorHandling and storage
Lyophilised peptide should be stored cold and protected from light until use. Once reconstituted, the solution is typically kept refrigerated. Always follow the storage guidance for the specific compound and your laboratory protocols.
Frequently asked questions
- What water is used to reconstitute research peptides?
- Bacteriostatic water — sterile water containing 0.9% benzyl alcohol — is the standard choice for reconstituting lyophilised research peptides in the laboratory.
- Should reconstituted peptide solution be shaken?
- No. The vial is swirled gently and left to dissolve, not shaken, to avoid degrading the peptide.
Related reading
How to read a Certificate of Analysis
A short guide to what a Certificate of Analysis actually tells you — and what to check before you trust a vial.
Compound guideRetatrutide
What retatrutide is, why it is of growing interest in laboratory research, and what Australian researchers should look for when sourcing it.
Buying guideHow to choose a peptide supplier
The checklist serious researchers use to separate a credible research supplier from a storefront — COA transparency above all.
Last updated 2 June 2026. This article is general information for researchers, not medical or legal advice.