Poor storage is one of the most common ways peptide integrity is compromised after a sample has already been correctly reconstituted. This article covers the basics of storing both lyophilised and reconstituted peptides.
Lyophilised (unmixed) peptides
- Store frozen, protected from light, until ready for use
- Keep the vial sealed until the day you plan to reconstitute it
- Avoid repeated temperature fluctuations — don't move a vial in and out of the freezer unnecessarily
Reconstituted peptides
- Generally store refrigerated, not frozen, once mixed with bacteriostatic water
- Use within the timeframe appropriate to that specific peptide, as stability varies
- Avoid repeated freeze-thaw cycles, which can degrade peptide structure
- Label every reconstituted vial with the date of preparation and concentration, for traceability
Why this matters for research consistency
A peptide that has degraded due to poor storage will not behave the same way in a research context as a freshly reconstituted one, even if the same nominal dose is used. Consistent storage practice is part of getting consistent, comparable results across a research protocol.
For full step-by-step reconstitution guidance, see our Reconstitution & Storage page, or use our Dosage Calculator to work out concentrations.
This article is provided for laboratory research reference only. All products sold by ASPeptides are strictly for laboratory research use and are not intended for human or veterinary use.