Ingredient or product comparison
GHK-Cu Cosmetic Storage: Comparison Table
Lyophilized powder (unopened) −20°C 12–24 months Yes. Wrap in foil Original sealed vial Most stable form. Degradation risk near zero if kept frozen and dry Lyophilized powder (opened but not reconstituted) 6–12 months Original vial resealed with parafilm Openi
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- Lyophilized powder (unopened)
- −20°C
- 12–24 months
- Yes. Wrap in foil
- Original sealed vial
- Most stable form. Degradation risk near zero if kept frozen and dry
- Lyophilized powder (opened but not reconstituted)
- 6–12 months
- Original vial resealed with parafilm
- Opening vial introduces moisture from ambient air. Use desiccant if storing long-term
- Reconstituted solution (aqueous carrier)
- 2–8°C
- 28 days maximum
- Yes. Amber glass vial or foil-wrapped clear vial
- Sterile sealed vial
- Degradation accelerates after 28 days even under refrigeration. Mark reconstitution date
- Commercial GHK-Cu serum (pre-mixed)
- Per manufacturer expiry (typically 3–6 months unopened)
- Yes. Opaque or amber bottle
- Original product bottle
- Stabilizers may extend shelf life beyond plain aqueous solution but refrigeration still required
- Frozen reconstituted solution (emergency preservation)
- 3–6 months
- Cryovial or original vial
- Freezing prevents degradation but freeze-thaw cycles damage peptide structure. Single-use aliquots only