Research Guide
Peptide Storage & Reconstitution
Simple, proven practices to protect peptide stability and quality — from delivery through to preparation.
Proper storage and reconstitution matter when working with research peptides. Following recommended handling practices helps preserve stability and product quality throughout your research. This guide covers our recommended best practices for storing lyophilised peptides and preparing them for laboratory use.
Lyophilised Powder
-20°C
Stable for up to 48 months
Reconstituted Solution
2–8°C
Use within approximately 2–8 weeks
*General guidelines — storage times may vary by individual peptide and conditions.
Storing Lyophilised Peptides
Research peptides are typically supplied freeze-dried (lyophilised), which significantly improves stability during transport and long-term storage when handled correctly. We recommend moving peptides into refrigerated or frozen storage as soon as possible after delivery. At Aura Lab Peptides, all products are kept in temperature-controlled conditions before dispatch to help maintain quality and consistency.
For long-term storage, keep peptides in a freezer at approximately -20°C. If they'll be used soon, refrigeration between 2°C and 8°C is generally suitable.
Avoid unnecessary exposure to:
Repeated temperature fluctuations can gradually reduce peptide stability over time.
Understanding Peptide Stability
Like many laboratory compounds, peptides naturally degrade over time. Initially this has little impact, but prolonged exposure to moisture, heat, oxygen or repeated thawing can eventually affect a peptide's molecular structure and overall stability. Maintaining consistent storage temperatures and minimising handling is recommended wherever possible.
Reconstituting Peptides: Step by Step
Warm to Room Temperature
Allow both the peptide vial and your chosen solvent to reach room temperature before mixing. This helps minimise condensation and reduces the chance of cloudiness during reconstitution.
Equalise Vial Pressure
Some lyophilised vials carry a slight vacuum or positive pressure from manufacturing. Before adding solvent, insert a sterile needle into the rubber stopper to let pressure equalise — this helps prevent the solution escaping when solvent is introduced.
Choose a Suitable Solvent
The right solvent depends on the peptide and your research requirements. Many researchers use bacteriostatic water for general reconstitution, while some peptides dissolve more effectively in alternatives such as dilute acetic acid. Always consult the relevant protocol where appropriate.
Mix Gently
Once solvent is added, gently swirl the vial until fully dissolved. Avoid vigorous shaking — let the peptide dissolve naturally where possible, as aggressive mixing can contribute to unnecessary degradation of delicate structures.
Avoid Over-Dilution
Where possible, prepare a concentrated stock solution before making further dilutions. Unnecessarily large solvent volumes reduce concentration and may not suit every research application.
Additional Best Practices
To help maintain peptide quality after reconstitution:
Storage at Aura Lab Peptides
We recognise the importance of maintaining product quality from storage through to dispatch. Our peptides are kept under carefully controlled conditions prior to shipment, helping ensure they reach you in the best possible condition. We're committed to high-quality research products, transparent documentation, and dependable customer service for laboratories and researchers across the UK.