Peptide Storage: Best Practices for Researchers

Why Proper Storage Matters

Peptides are sensitive biological molecules that can degrade when exposed to improper conditions. Proper storage is essential for:

- Maintaining peptide activity and potency - Extending shelf life - Ensuring reproducible research results - Protecting your investment

Lyophilized (Powder) Peptide Storage

Optimal Conditions

Temperature:** -20°C (freezer) for long-term storage

Light:** Keep in original amber vial or wrap in foil

Humidity:** Keep vial sealed to prevent moisture absorption

Duration:** Up to 24 months at -20°C

What to Avoid

❌ Room temperature storage

❌ Direct sunlight or UV exposure

❌ Repeated freeze-thaw cycles

❌ Humid environments

Reconstituted Peptide Storage

Optimal Conditions

Temperature:** 2-8°C (refrigerator) - NEVER freeze

Light:** Protect from light

Duration:** 14-30 days (varies by peptide)

Why Not Freeze Reconstituted Peptides? Freezing causes ice crystal formation that damages protein structure, concentration changes, and denaturation.

Signs of Peptide Degradation

⚠️ **Cloudy solution** - Possible contamination ⚠️ **Color change** - Oxidation or degradation ⚠️ **Precipitate at bottom** - Peptide falling out ⚠️ **Unusual odor** - Bacterial contamination

Summary Table

| Peptide State | Temperature | Duration | |--------------|-------------|----------| | Lyophilized (long-term) | -20°C | 24 months | | Lyophilized (short-term) | 2-8°C | 1-3 months | | Reconstituted | 2-8°C | 14-30 days |

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*Proper storage protects your research investment.*