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Lyophilised vs Reconstituted: Storage Temperature Differences
The storage requirements for sermorelin depend entirely on its physical state. Lyophilised (freeze-dried) sermorelin and reconstituted sermorelin are chemically identical but behave completely differently under temperature stress. Understanding this distinctio
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- The storage requirements for sermorelin depend entirely on its physical state. Lyophilised (freeze-dried) sermorelin and reconstituted sermorelin are chemically identical but behave completely differently under temperature stress. Understanding this distinction prevents the most common storage errors we see in research settings.
- Lyophilised sermorelin is a solid powder created by removing all water from the peptide solution under vacuum at sub-zero temperatures. Without water, peptide molecules cannot move. They remain locked in their native conformation indefinitely at −20°C. Stability data from peptide manufacturers shows lyophilised sermorelin retains over 98% potency after 24 months at −20°C. Some facilities report stable storage for 36 months or longer. The peptide is essentially inert in this state. No enzymatic degradation, no oxidation, no structural unfolding.
- Reconstituted sermorelin is the same peptide dissolved in bacteriostatic water. Now the peptide is mobile. Amino acids can rotate. Side chains can interact. Hydrogen bonds can break and reform. At 2–8°C, this motion is slow enough that the alpha-helix structure remains stable for weeks. At 25°C (room temperature), motion accelerates. The peptide unfolds within days. At 37°C (body temperature), degradation is measurable within hours.
- This is why sermorelin need refrigeration storage strictly after reconstitution. The hydrated peptide is thermodynamically unstable at any temperature above freezing. Researchers sometimes ask whether reconstituted sermorelin can be re-frozen to extend shelf life. The answer is no. Freezing causes ice crystal formation, which physically disrupts peptide structure. Thawing a frozen peptide solution produces visible precipitation. Aggregated peptides that no longer dissolve and cannot bind to receptors.
- For research applications requiring long-term storage, the correct approach is to store sermorelin in lyophilised form at −20°C and reconstitute only the volume needed for 28 days of use. Facilities managing large peptide inventories. Like Real Peptides, which supplies research-grade compounds including MK 677 and CJC1295 Ipamorelin. Maintain climate-controlled freezers at −20°C ±2°C with continuous temperature monitoring to ensure peptide stability before shipment.