Peptide Storage & Handling

How to keep research peptides stable — from the moment they arrive as lyophilized powder to after they are in solution.

Lyophilized (unmixed) vials

In freeze-dried form, research peptides are relatively stable. Store lyophilized vials at −20 °C, protected from light and moisture. Kept this way, they hold their integrity for extended periods.

Peptides in solution

Once a peptide is in solution it is more sensitive. Keep in solution vials refrigerated (roughly 2–8 °C), away from light, and minimize temperature swings. Bacteriostatic water helps limit microbial growth during use.

Shipping & short-term transit

Lyophilized peptides tolerate brief periods at ambient temperature during shipping without meaningful loss of integrity, which is why they are shipped freeze-dried. Return them to cold storage promptly on arrival.

Handling best practices

• Swab stoppers before every withdrawal and use sterile transfer equipment.
• Swirl rather than shake to avoid stressing the peptide.
• Label in solution vials with concentration and date.
• Avoid repeated freeze–thaw cycles of solutions.

Quality starts with the source

Stable results begin with a well-made product. Every Glow Lab Protocols peptide is 99%+ purity and third-party tested for identity and quality.

Research use only. Not for human consumption. Content is provided for laboratory and educational purposes and is not medical advice.