# Storing lyophilised peptides | Peps for Pups

> How freeze-dried research peptides are normally stored and handled, and what affects their stability.

Source: https://pepsforpups.co.uk/learn/storing-lyophilised-peptides
Publisher: Peps for Pups (https://pepsforpups.co.uk)
Last updated: 2026-11-13

Lyophilised means freeze-dried. Removing water makes a peptide far more stable, but storage still matters.

## What affects stability

- **Heat.** Higher temperatures speed up breakdown.
- **Moisture.** Freeze-dried powder draws in water from the air once a vial is opened.
- **Light.** Direct light can degrade some peptides.

## General laboratory practice

- Keep unopened vials cold. A freezer is the usual choice for long-term storage and a fridge for the short term.
- Keep vials in their box, away from light.
- Let a cold vial reach room temperature before opening it, so condensation does not form inside.
- Record the batch number and the date the vial was received.

## In transit

Freeze-dried peptides are generally stable at ambient temperature for the short time a parcel spends in the post. Put vials into cold storage when they arrive.

## Checking what arrives

- The seal and cap should be intact.
- The powder is normally a white cake or loose white powder. Appearance can vary between batches.
- The batch number on the vial should match your paperwork and the [certificate](/certificates).

If anything looks wrong, contact us before opening the vial. Our [delivery and returns](/delivery-and-returns) page explains what happens next.

This guide describes storage of a research compound. It is not guidance on use in people or animals.

---
BPC-157 is supplied for research use only. It is not a veterinary medicine and is not for human or animal consumption.