How to Store Peptides Correctly

Storing peptides correctly is crucial for maintaining their stability and bioactivity. Here are the best practices for independent researchers working in the UK.

1. Lyophilized Form Storage

Most peptides arrive in a lyophilized (freeze-dried) state. In this form, they are highly stable:

• Short-term (weeks): Room temperature or refrigerated (4°C)
• Medium-term (months): Refrigerated (4°C)
• Long-term (years): Deep freeze (-20°C to -80°C)

2. Reconstituted Form Storage

Once a peptide is reconstituted in sterile water or bacteriostatic water, its stability decreases significantly:

• Refrigerate immediately: Always store at 4°C.
• Avoid refreezing: Reconstituted peptides should not be refrozen as ice crystal formation can shear the delicate peptide chains.

3. Light and Humidity

• Light Sensitive: Keep vials in the dark (refrigerators are perfect).
• Humidity: Ensure vials are tightly sealed. Condensation is an enemy of purity.

Check out our Melanotan II for your next research project. Every batch comes with a verified CoA.