Storage & Reconstitution

 

Peptide Storage & Reconstitution Guide

Proper storage and reconstitution are important considerations when working with research peptides. Following recommended handling practices can help preserve peptide stability and maintain product quality throughout the course of your research.

This guide outlines general best practices for storing lyophilised peptides and preparing them for laboratory use.

Storing Lyophilised Peptides

Research peptides are typically supplied in a lyophilised (freeze-dried) form. This significantly improves stability during transport and long-term storage when handled correctly.

Although lyophilised peptides are suitable for shipping, we recommend placing them into refrigerated or frozen storage as soon as possible after delivery.

At Aura Lab Peptides, all products are stored in temperature-controlled conditions before dispatch to help maintain quality and consistency.

For long-term storage, peptides should ideally be kept in a freezer at approximately -20°C. If they will be used in the near future, refrigeration between 2°C and 8°C is generally suitable.

Avoid unnecessary exposure to:

  • Heat

  • Moisture

  • Direct sunlight

  • Frequent freeze-thaw cycles

Repeated temperature fluctuations can gradually reduce peptide stability over time.

Recommended Storage Conditions

Peptide Form Storage Temperature Typical Storage Period*
Lyophilised Powder -20°C Up to 48 months
Reconstituted Solution 2–8°C Approximately 2–8 weeks

*Storage times are general guidelines and may vary depending on the individual peptide and storage conditions.

Understanding Peptide Stability

Like many laboratory compounds, peptides naturally degrade over time.

Initially this degradation may have little impact, but prolonged exposure to moisture, heat, oxygen or repeated thawing can eventually affect the peptide's molecular structure and overall stability.

For this reason, maintaining consistent storage temperatures and minimising handling is recommended wherever possible.

Reconstituting Peptides

Most research peptides require reconstitution before use.

Before mixing, allow both the peptide vial and your chosen solvent to reach room temperature. This helps minimise condensation and may reduce the likelihood of cloudiness forming during reconstitution.

Equalising Vial Pressure

Some lyophilised peptide vials may contain a slight vacuum, while others may have positive internal pressure as a result of the manufacturing process.

Before adding solvent, insert a sterile needle into the rubber stopper to allow the pressure inside the vial to equalise.

This simple step can help prevent solution from escaping when the solvent is introduced.

Choosing a Suitable Solvent

The appropriate solvent depends on the peptide being used and your research requirements.

Many researchers choose bacteriostatic water for general reconstitution, while certain peptides may dissolve more effectively in alternative solutions such as dilute acetic acid.

Always consult the relevant protocol or published research where appropriate.

Mixing the Solution

Once the solvent has been added:

  • Gently swirl the vial until fully dissolved.

  • Avoid vigorous shaking or excessive agitation.

  • Allow the peptide to dissolve naturally where possible.

Aggressive mixing may contribute to unnecessary degradation of delicate peptide structures.

Avoid Over-Dilution

Where possible, prepare a concentrated stock solution before making further dilutions if required.

Using unnecessarily large solvent volumes can reduce concentration and may not be appropriate for every research application.

Additional Best Practices

To help maintain peptide quality after reconstitution:

  • Store reconstituted peptides between 2°C and 8°C.

  • Minimise repeated freeze-thaw cycles.

  • Use sterile handling techniques throughout preparation.

  • If particulate matter remains after mixing, gentle sonication may assist dissolution.

  • Where sterility is important, filtration through an appropriate laboratory-grade membrane may be considered.

Storage at Aura Lab Peptides

At Aura Lab Peptides, we recognise the importance of maintaining product quality from storage through to dispatch. Our peptides are kept under carefully controlled storage conditions prior to shipment, helping ensure they reach our customers in the best possible condition.

We are committed to providing high-quality research products, transparent documentation, and dependable customer service for laboratories and researchers across the UK.