Changes in hair texture, reduced breakage, improved scalp health, or other effects may appear before visible regrowth
This dynamic interaction is a two-way street: the gut microbiome can influence the production and activity of peptide hormones, which in turn can affect the balance and health of the microbiome

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
However, pretty much every facet of modern-day life can contribute to draining our glutathione levels
Association of tear fluid glutathione synthetase and glutathione levels with amyloid [PMID: 41927845] Laboratory literature summary: Association of tear fluid glutathione synthetase and glutathione levels with amyloid positivity