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Some studies suggest that unbound GHK (without copper) may be just as effective in skin regeneration, sparking debates about whether copper binding is necessary
Immune Wellness: Supports normal immune-cell antioxidant and metabolic functions
Manevich Y, Feinstein SI, Fisher AB (2004) Activation of the antioxidant enzyme 1-CYS peroxiredoxin requires glutathionylation mediated by heterodimerization with GST
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