Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Does GHK-Cu Need Refrigeration Storage: Storage Type Comparison

Freezer (ideal for long-term) −20°C to −30°C 12–24 months Not recommended (freeze-thaw damage) Minimal. Molecular motion arrested Best for unopened lyophilised powder; avoid for reconstituted solutions Refrigerator (standard post-reconstitution) 2–8°C 6–12 mon

This source-based comparison does not add ratings or recommend a winner.

  • Freezer (ideal for long-term)
  • −20°C to −30°C
  • 12–24 months
  • Not recommended (freeze-thaw damage)
  • Minimal. Molecular motion arrested
  • Best for unopened lyophilised powder; avoid for reconstituted solutions
  • Refrigerator (standard post-reconstitution)
  • 2–8°C
  • 6–12 months
  • 28–60 days
  • Slow. Hydrolysis and oxidation proceed at 25% room-temperature rate
  • Required for all reconstituted GHK-Cu; use amber vials or foil wrap
  • Room temperature (short-term only)
  • 20–25°C
  • 1–3 months
  • 3–7 days
  • Fast. Potency loss of 15–25% in first week
  • Acceptable only for unopened lyophilised powder in climate-controlled environments
  • Elevated temperature (avoid)
  • Above 30°C
  • Days to weeks
  • Hours to 48 hours
  • Severe. Peptide bonds cleave, copper dissociates
  • Complete loss of biological activity; discard any vial exposed for >24 hours