Research-use context: This article is provided for laboratory research and educational purposes only. It is not medical, therapeutic, diagnostic, veterinary, dosing or human-use guidance.
Lyophilisation is a stability strategy, not a guarantee
Freeze-drying is widely used to improve the storage stability of labile biological materials by reducing water content. However, the freezing and drying process can itself create physical stresses, and different peptides or formulations can respond differently.
Avoid universal storage rules
It is tempting to apply one temperature rule to every lyophilised peptide. Published formulation research shows why that is too simplistic. Stability depends on molecular structure, formulation, residual moisture, excipients, container closure and environmental conditions.
What researchers should record
Follow the storage specification supplied for the individual material. Record receipt condition, storage location and any significant deviation. When comparing experiments across time, storage history can be an important part of the material record.
References
Mensink MA et al. reviews of lyophilised protein stability; see PMID: 33275971. Patel SM et al. Development of stable lyophilized protein drug products. PMID: 22283723.