Ingredient or product comparison
GHK-Cu Storage Protocol: Lyophilised vs Reconstituted Comparison
Lyophilised powder (unopened) −20°C to −80°C 18–24 months Residual moisture hydrolysis, oxidation Sealed glass vial + desiccant in secondary container Best for long-term storage. Freeze immediately upon delivery Lyophilised powder (opened, resealed) −20°C 6–12
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- Lyophilised powder (unopened)
- −20°C to −80°C
- 18–24 months
- Residual moisture hydrolysis, oxidation
- Sealed glass vial + desiccant in secondary container
- Best for long-term storage. Freeze immediately upon delivery
- Lyophilised powder (opened, resealed)
- −20°C
- 6–12 months
- Moisture infiltration, sublimation in frost-free freezers
- Sealed vial + desiccant
- Acceptable if resealed quickly, but stability drops
- Reconstituted solution (single aliquot, frozen)
- 6–8 months
- Ice crystal formation during freeze-thaw, slow hydrolysis
- Borosilicate glass or polypropylene cryovial
- Ideal for labs with consistent usage. Avoids repeat freeze-thaw
- Reconstituted solution (refrigerated, not frozen)
- 2–8°C
- 30–45 days
- Peptide bond hydrolysis, copper dissociation, bacterial growth (if not bacteriostatic)
- Borosilicate glass with PTFE cap
- Use only for immediate-term applications within 4–6 weeks
- Reconstituted solution (room temperature)
- 20–25°C
- 24–72 hours
- Rapid hydrolysis, oxidation, copper precipitation
- Not recommended for storage
- Emergency use only. Expect 30–40% activity loss within 48 hours