Why Storage Matters
Peptides are susceptible to degradation from heat, moisture, light, and oxidation. Maintaining potency from the moment of receipt to use is critical for reproducible research outcomes. This guide applies to all research peptides available in our OzPeptides catalogue.
Lyophilised (Freeze-Dried) Peptides
Lyophilised peptides — the standard form in which research peptides are shipped — offer the greatest stability. General guidelines:
- Long-term storage (months to years): -20°C in a frost-free freezer, sealed and desiccated
- Short-term storage (up to 4 weeks): 4°C (refrigerator), away from light
- Transport: Sealed vials are stable at ambient temperature for several days — as shipped by OzPeptides with insulated packaging
Always allow vials to reach room temperature before opening to avoid moisture condensation on the peptide cake.
Reconstituted Peptides
Once reconstituted with bacteriostatic water (available in our research supplies), peptides are significantly less stable:
- Store at 4°C
- Use within 2–4 weeks
- Never refreeze a reconstituted solution
- Use amber or foil-wrapped vials to protect from light
Peptide-Specific Considerations
Some peptides have unique storage requirements:
- Semaglutide / GLP-1 agonists: Particularly sensitive to temperature cycling. Store at -20°C and minimise freeze-thaw cycles.
- BPC-157: Relatively stable lyophilised. Reconstituted solutions should be used within 3 weeks.
- TB-500 (Thymosin Beta-4): Store lyophilised at -20°C; reconstituted at 4°C for up to 5 days.
- GHK-Cu: Copper peptides are sensitive to oxidation; store in inert (amber) vials.
Reconstitution Best Practices
- Allow the lyophilised vial to reach room temperature
- Use bacteriostatic water (0.9% benzyl alcohol in sterile water) for research reconstitution
- Inject solvent slowly down the side of the vial — do not inject directly onto the peptide cake
- Swirl gently — never vortex or shake vigorously
- Allow 5–10 minutes for complete dissolution before use
All storage requirements for individual compounds are listed on each product page. Certificate of Analysis documents are available for every batch.
All products are sold for research and laboratory purposes only. Not intended for human consumption.