Copper peptides first became popular in anti-aging skincare because they are associated with skin repair, collagen support, and antioxidant-related activity
And the reason for that is several fold
Glutathione is taken orally to treat cataracts and glaucoma, to prevent aging, to treat or prevent alcoholism, asthma, cancer, heart disease (atherosclerosis and high cholesterol), hepatitis, liver disease, diseases that weaken the body's defense system (such as AIDS and chronic fatigue syndrome), memory loss, Alzheimer's disease, osteoarthritis, and Parkinson's disease
In prokaryotes, glutathione maintains the proper oxidation states of protein thiols and protects cells from damage under abnormal conditions such as low pH, chlorine compounds, oxidative and osmotic stresses 8
Staphylococcus aureus and Staphylococcus epidermidis strain diversity underlying pediatric atopic dermatitis
It helps in providing anti-oxidant to the body