According to a 2018 review, GHK-Cu as a cosmetic ingredient has demonstrated the ability to:3 Tighten loose skin Reverse age-related skin thinning Repair the skins protective barrier proteins Improve skin firmness and elasticity Reduce the appearance of fine lines and wrinkles Smooth rough skin Stimulate wound healing Lessen the appearance of photodamage (sun damage), hyperpigmentation, skin spots, lesions, and more Reduce inflammation and damage from free radicals Increase hair growth and thickness Additionally, in research from 2015, the authors noted that GHK-Cu may be able to stimulate collagen, regulate the skin remodeling process, attract immune cells to the site of an injury, and restore replicative vitality to fibroblasts (a cell that helps form connective tissue) in patients whove undergone radiation therapy for cancer.2 6 GHK-Cu isnt limited to topical/cosmetic forms, however

The benzyl alcohol preservative is generally safe at the tiny doses used for diluting medications in adults, but it poses severe risk to neonates
Protocols lasting 812 weeks show measurably better tissue outcomes when injection timing aligns with researcher workflow patterns that ensure zero missed doses, compared to theoretically optimal but inconvenient schedules that introduce gaps
The Journal of Clinical Investigation, 92 (5), 2368-2376.