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Everything you need to know about reconstituting Peptides

Peptides are becoming increasingly popular in the fields of research. To ensure optimal results, it's important to understand how to store and reconstitute these versatile compounds properly. This blog post will cover everything you need about peptide storage and reconstitution, including tips for maintaining the highest quality and effectiveness.

1. Peptide Storage: Preserving Quality and Stability

Proper peptide storage is crucial to maintain its stability and potency. Peptides can degrade or denature if exposed to extreme temperatures, humidity, or light. To minimize these risks, follow these guidelines:

a) Store peptides in a cool, dry place: The ideal storage location for peptides is in a refrigerator (2-8°C) or freezer (-20°C). Avoid storing peptides in the fridge or freezer door, as temperature fluctuations can occur in these areas.

b) Protect peptides from light: Peptides can be sensitive to light, especially UV radiation—store peptides in dark places or containers that block light to prevent degradation.

c) Handle peptides carefully: Peptides can be damaged by rough handling or exposure to contaminants. Use clean utensils and containers when handling peptides to ensure their integrity.

2. Peptide Reconstitution: Achieving Optimal Results

Peptides are typically supplied as lyophilized (freeze-dried) powders to ensure maximum stability during transport. Before use, these powders must be reconstituted with a suitable solvent. The reconstitution process involves the following steps:

a) Allow the peptide to reach room temperature before opening the vial to prevent condensation.

b) Start with bacteriostatic water as the solvent for reconstitution. For peptides that are challenging to dissolve, consider using acetic acid. A 50% aqueous acetic acid solution may be necessary for hydrophobic peptides.

c) Create a stock solution with a higher concentration than required for your assay. This will allow for further dilution with the assay buffer later.

d) Gently swirl the solution until the peptide dissolves completely. Avoid shaking the vial to prevent damage to the peptide.

3. Additional Tips for Peptide Reconstitution

In some cases, peptides may require additional steps or techniques to ensure complete dissolution:

a) Sonication: If the peptide remains as visible particles in the solution, try using sonication to break down lumps of solid peptide and stir the solution. Note that sonication will not change the peptide's solubility characteristics but can help facilitate dissolution.

b) Filtering: If bacterial contamination is a concern, pass your peptide solution through a 0.2 µm filter.


Understanding peptides' proper storage and reconstitution techniques is essential for maintaining their quality, stability, and effectiveness. Following the guidelines outlined in this blog post, you'll be well-equipped to safely and efficiently handle peptides, ensuring optimal results in your research or personal health endeavours. Remember to store peptides in a cool, dry place, protect them from light, and handle them carefully. When reconstituting peptides, start with bacteriostatic water, create a stock solution, and gently swirl until the peptide dissolves. Remember that additional techniques, such as sonication and filtering, may be necessary for some peptides.