Lyophilized peptides should be stored in a cool, dry, and dark place at -20°C or colder to maintain their stability and potency: 

• Temperature: Store at -20°C or colder for long-term storage, or at 4°C or colder until use. Avoid frost-free freezers, as temperature and moisture changes can affect peptide stability. 
• Light: Keep away from bright light. 
• Moisture: Exposure to moisture can significantly decrease the peptide’s long-term stability. 
• Desiccants: Store in a closed, dry environment with desiccants. 
• Freeze-thaw cycles: Avoid freeze-thaw cycles, as they can degrade peptides. To reduce freeze-thaw cycles, aliquot the peptide into separate vials. 
• Anaerobic conditions: Peptides with Cys, Met, or Trp residues are prone to oxidation and should be stored under anaerobic conditions. 
• Desiccator: Peptides with Asp, Glu, Lys, Arg, or His are prone to moisture absorption and should be stored in a desiccator in a tightly capped vial. 

Before using the peptide, allow it to warm to room temperature to reduce moisture uptake. After removing the desired amount, reseal the vial, preferably under an inert gas, and return it to cold storage.