Jan 3, 2026 Dark circles under eyes create persistent cosmetic concern affecting appearance across all ages and skin types, with multiple underlying causes including thin periorbital skin revealing underlying vasculature, hyperpigmentation from melanin accumulation, shadows from volume loss and fat pad descent, and fluid retention creating puffiness accentuating darkness
Optimizing successful protocols: If achieving good results, experiment with maintenance strategies
What GHK-Cu adds to the formulation: Gene expression modulation across hundreds of genes including collagen genes (Type I, III), tissue inhibitors of metalloproteinases, anti-inflammatory mediators Collagen synthesis stimulation, specifically Type I and Type III collagen the structural proteins of skin, connective tissue, and many other tissues Anti-inflammatory signaling through investigated effects on TNF-, IL-6, and NF-B pathways Copper-peptide chemistry effects including cofactor activity for skin-relevant enzymes Skin-research and hair-research applications (the GHK-Cu literature in these areas is substantial) For the GHK-Cu deep-dive, see Copper Peptides Explained
Niacinamide: Helps improve skin barrier function, reduce redness, and minimize pores