Unsurprisingly, many of the diseases and conditions associated with oxidative stress are also linked to dysregulations or deficiencies in levels of glutathione
This may include instances where: You need a stronger product to achieve your goals (e.g., deep hyperpigmentation, severe acne, etc.) You already use another product containing copper (this could be unsafe) An essential part of your skin care routine is a harsh active, vitamin C, strong exfoliant, or salicylic acid many of which are common ingredients in acne treatments and anti-aging products (copper peptides shouldnt be mixed with them) Using copper peptides may be unsafe (i.e., you have Wilsons disease, a peptide allergy, or active/suspected cancer) Youve tried a copper peptide product in the past and experienced an adverse reaction (e.g., copper uglies or troublesome side effects) If youd like some alternatives to copper peptides, we go over a few in the Alternatives to copper peptide serums section later in this guide

Basically AsA influence the expression of senescene associated genes (SAGs) and lower AsA fraction is linked with increased senescence while higher vitamic C contents delayed it (Zhang, 2013b)
Ans: Results vary from person to person, but with consistent use, you may start noticing a brighter, more even skin tone within 6 to 8 weeks