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GHK-Cu (glycyl-L-histidyl-L-lysine copper) is a copper peptide that signals fibroblasts to rebuild collagen and elastin, the structural proteins skin firmness depends on, and remodels the extracellular matrix your skin sits on

After cleansing, apply a vitamin C serum or a niacinamide-based product to further boost radiance

The reduction of red blood cell production is particularly obvious, which can cause pernicious anemia in animals

3 Glutathione levels naturally decline with age and may also be reduced by factors such as chronic stress, environmental toxins, and poor nutrition, making replenishment an important consideration for healthy aging