Storage matters as much as the peptide itself
Even the highest-purity research peptide will degrade quickly if stored badly. The three variables that matter most are temperature, humidity, and light exposure.
Lyophilised (dry) peptides
- Long-term (months to years): store at −20 °C or colder, sealed against humidity. This is how Peptovia Research ships its products.
- Short-term (weeks): a refrigerator at 2–8 °C is adequate.
- Keep the vial sealed until use. Every opening introduces atmospheric moisture that can accelerate degradation of the pellet.
Reconstituted (in-solution) peptides
- Store at 2–8 °C in a refrigerator.
- Use within 28 days for most peptides.
- Do not freeze reconstituted solutions unless the manufacturer's data sheet explicitly allows it — freeze/thaw cycles denature many peptide chemistries.
- Keep away from direct light. Peptides in solution are more sensitive to photodegradation than the dry form.
Cold-chain handling
- Bring vials to room temperature before opening. Condensation on a cold vial introduces water into the pellet.
- After reconstitution, always return the vial to the fridge as soon as possible.
- Transport reconstituted peptides in insulated packaging with a coolant pack if travel exceeds an hour.
What degradation looks like
Signs your stored peptide may have degraded:
- Discolouration of the pellet or solution
- Visible particulates in solution
- Off-odour on opening (unusual for peptides — a strong sign of chemistry breakdown)
- Loss of expected activity in downstream assays
Compliance reminder
All products supplied by Peptovia Research are for laboratory research use only and are not for human or veterinary consumption, diagnosis, treatment or therapy.
Storage Cold chain Best practice