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The peptide stimulates healthy fibroblast growth while inhibiting cancer cell growth at 1-10 nanomolar, demonstrating selective proliferation control based on cellular health status

Your body produces GHK-Cu naturally, though levels decline significantly with age

Finding your optimal concentration The best copper peptide concentration for your skin depends on multiple factors: current skin condition, sensitivity level, experience with active ingredients, specific goals, and how your skin responds to initial trials

The peptide may help follicles recover more quickly after autoimmune flares resolve

The efficacy of 2% copper peptide (GHK-Cu) serum for eyebrow hypotrichosis: A randomized, double-blind, vehicle-controlled, split-face comparative study

doi: 10.1016/j.regpep.2009.11.005