Ingredient or product comparison
GHK-Cu Storage: Method Comparison
Lyophilised powder (freezer) −20°C 24–36 months 95–100% Yes. Mix before use Long-term bulk storage before initial preparation Lyophilised powder (fridge) 2–8°C 60 days maximum 85–95% (degrades slowly) Short-term storage when freezer unavailable Reconstituted s
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- Lyophilised powder (freezer)
- −20°C
- 24–36 months
- 95–100%
- Yes. Mix before use
- Long-term bulk storage before initial preparation
- Lyophilised powder (fridge)
- 2–8°C
- 60 days maximum
- 85–95% (degrades slowly)
- Short-term storage when freezer unavailable
- Reconstituted solution (fridge)
- 28–30 days
- 90–95% with bacteriostatic water
- No. Ready to use
- Daily-use formulations over 2–4 weeks
- Reconstituted solution (frozen aliquots)
- 12–18 months
- 90–95% if never refrozen
- No. Thaw and use
- Batch preparation with infrequent use
- Room temperature (any form)
- 20–25°C
- 24–72 hours before significant loss
- <60% after 72 hours
- Depends on form
- Emergency only. Potency drops rapidly
- Professional Assessment
- Freezer (−20°C) for powder; refrigerator (2–8°C) for mixed solution; single-use frozen aliquots for extended storage
- Optimal approach depends on usage frequency. Daily users should refrigerate small batches; occasional users should freeze aliquots
- UV-blocking amber containers and bacteriostatic water are non-negotiable for any storage method lasting beyond one week
- Never store reconstituted peptide at room temperature for more than the time it takes to draw a dose
- Most failures occur from refreezing thawed peptides or using clear containers that allow light degradation