Peptides in transport

Peptides in lyophilized form are supplied in glass vials by standard shipping methods and do not require refrigeration. Short-term temperature fluctuations during transport will not reduce their quality and efficacy. Even at high summer temperatures, the peptides in lyophilized form are stable for several weeks.

Storage of lyophilized peptides

Lyophilized peptides should be stored in a dry place, protected from light and moisture. The following storage conditions are generally recommended:

• Room temperature (15–25 °C): Up to 3 months
• Refrigerated (2–8 °C): Up to 6 months
• Frozen (-20 °C or below): 3–5 years (recommended for long-term storage)

Allow the vial to reach room temperature after taking it out of the refrigerator or freezer.

Storage of reconstituted peptides

Once reconstituted, peptide solutions are generally less stable than their lyophilized form and should be stored under refrigerated conditions whenever possible.

The following storage conditions are generally recommended:

• Room temperature (15–25 °C): Avoid prolonged storage
• Refrigerated (2–8 °C): Typically 4–8 weeks
• Frozen (-20 °C or below): Up to 3–4 months

To preserve peptide integrity, avoid repeated freeze–thaw cycles, as these may accelerate peptide degradation.

Important: Most manufacturers recommend discarding reconstituted peptides within 4 weeks when stored at 2–8 °C. This recommendation is intentionally conservative and may not reflect the actual chemical stability of every peptide. In our own stability studies, many peptides reconstituted in bacteriostatic water showed no detectable degradation after 12 weeks of refrigerated storage. As peptide stability is highly sequence- and formulation-dependent, this result should not be extrapolated to all peptides without supporting stability data.