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Peptide Storage & Shelf Life
Standard laboratory storage practices for lyophilised and reconstituted research peptides.
Lyophilised (Freeze-Dried) Peptides
Lyophilised peptides in sealed vials represent the most stable storage form. At -20°C, most research peptides remain stable for 24–36 months. At 2–8°C (standard refrigerator), 6–12 months is typical for sealed vials. Room temperature storage (15–25°C) is suitable for short-term transport (days to weeks) but not recommended for extended periods. Key principle: the lower the temperature, the slower the degradation. Exposure to moisture, light, and heat are the primary degradation risks for lyophilised powder.
Reconstituted Peptides
Once reconstituted in bacteriostatic water (0.9% benzyl alcohol), peptides should be stored upright at 2–8°C. The benzyl alcohol preservative inhibits bacterial growth, extending usable life significantly compared to reconstitution in plain sterile water. Standard research practice: most peptides are considered stable for 28–42 days when reconstituted with bacteriostatic water and refrigerated. Exceptions exist — some more fragile peptides (e.g. Epithalon) are typically considered stable for 14–21 days reconstituted.
Why Reconstituted Peptides Should Not Be Frozen
Freezing reconstituted peptide solution is not standard research practice for several reasons: ice crystal formation can disrupt peptide structure; repeated freeze-thaw cycles progressively degrade both the peptide and the bacteriostatic preservative; and the BAC water does not remain effective after repeated cycles. The correct approach is to freeze lyophilised powder and reconstitute only the volume needed for the research period.
Peptide-Specific Shelf Life Reference
As a general research reference: BPC-157 is exceptionally stable — reconstituted up to 42 days. TB-500 reconstituted: 28–35 days. GHK-Cu reconstituted: 28 days. CJC-1295 (DAC) reconstituted: 21–28 days. Ipamorelin reconstituted: 28 days. Semax (intranasal): 30 days refrigerated. These are general laboratory guidelines based on published stability data. Use the Storage Calculator at /tools/storage for vial-specific tracking.
Degradation Signs
Research vials should be discarded if: the reconstituted solution becomes cloudy or develops visible particulate matter; colour changes occur (most peptides reconstitute to a clear, colourless solution); the solution develops an unusual odour; or the stored period has exceeded the recommended timeframe. Degraded peptides produce unreliable research data and may contain breakdown products.
Research Disclaimer: All content on this page is provided for educational and informational purposes only and relates strictly to published preclinical research. Silver Peptide products are supplied for in vitro laboratory research use only. They are not approved by the MHRA, FDA, or any regulatory body for human consumption, injection, or veterinary use. They are not medicines and must not be used as such. Nothing on this page constitutes medical advice.