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Use within validated timeframes: Reconstituted peptide solutions stored at 2-8C should generally be used within 4-6 weeks maximum, with many vendors recommending 7-14 days
GHK-Cu is generally well-tolerated in published in-vitro and animal-model work at standard research concentrations
Clinical studies indicate 1-3% concentrations deliver optimal efficacy for skin remodeling benefits without irritation
If you have any worries or concerns with using your skincare products consult with your doctor or dermatologist for peace of mind
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