How to Store Research Peptides: Powder, Reconstituted and Shipping

Peptides are chains of amino acids, and they break down through moisture, heat, light and oxidation. Good storage protects your research.

Lyophilized (powder) vials

• Freeze-dried peptides are the most stable form.
• For long-term storage, many labs keep them frozen at about −20 °C.
• For shorter periods, refrigeration at 2–8 °C is common.
• Keep vials sealed, dry and away from light. Let a cold vial reach room temperature before opening to limit condensation.

Reconstituted vials

• Once in solution, peptides degrade faster.
• Store refrigerated at 2–8 °C and protect from light.
• Avoid repeated freeze–thaw cycles, which can break down peptide structure.
• Using bacteriostatic water helps limit microbial growth for multi-use vials.

During shipping

Lyophilized peptides tolerate short transit well, but heat is still the enemy. We pack every order with insulated, cold-chain packaging and tracked dispatch from Boise.

Single vial or 10-pack?

If your work only needs one vial, buy one — that way no stock sits in storage longer than necessary. For ongoing projects, a sealed 10-vial kit lowers the per-vial price while keeping unopened vials in their most stable form.