Lab protocol · 8 min read
How to Store Peptides Correctly: A Lab Protocol
Correct peptide storage is the difference between intact research material and degraded compound. Here is the complete lab storage protocol.
Why storage matters
Peptides are biologically active molecules. Improper storage causes hydrolysis, oxidation, aggregation and loss of activity. Even short periods at the wrong temperature can compromise a research batch.
Lyophilised storage
Lyophilised (freeze-dried) peptides should be stored at minus 20 degrees Celsius for long-term stability. For short-term use over a few weeks, refrigeration at 2 to 8 degrees Celsius is acceptable. Always allow a refrigerated or frozen vial to reach room temperature before opening to prevent moisture condensation inside the vial.
Reconstituted storage
Once reconstituted with sterile bacteriostatic water, store at 2 to 8 degrees Celsius and use within 28 days. Aliquot into single-use volumes where possible to avoid repeated freeze-thaw cycles, which are one of the leading causes of activity loss.
Light and air exposure
Some peptides (notably GHK-Cu) are light-sensitive and should be shielded from direct UV. All peptides should remain sealed until use, as freeze-dried material readily absorbs ambient moisture.
Freeze-thaw cycles
Repeated freezing and thawing accelerates degradation. Plan aliquot volumes around your protocol so each thawed vial is used in a single session.
Products mentioned in this guide
Frequently Asked Questions
What temperature should lyophilised peptides be stored at?+
Minus 20 degrees Celsius for long-term storage, or 2 to 8 degrees Celsius for short-term use within a few weeks.
How long does reconstituted peptide last?+
Up to 28 days at 2 to 8 degrees Celsius under sterile conditions.
Why should I avoid freeze-thaw cycles?+
Each freeze-thaw cycle accelerates degradation. Aliquot reconstituted material into single-use volumes.
Are peptides light-sensitive?+
Some are, notably GHK-Cu. Store away from direct UV exposure.