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It exists purely for gastrointestinal adaptation

It is important to note that not all cells naturally produce enough glutathione for adequate detoxification

Preclinical data suggest AHK-Cu may stimulate collagen and elastin production in dermal fibroblast models, with associated increases in dermal matrix density in animal studies, proposed to occur through AHK-Cu's modulation of VEGF and TGF-1 expression activating both fibroblasts (which build structural matrix proteins) and endothelial cells (which support the vascular network needed for tissue regeneration).[4] A separate in vitro study by Pyo et al

When people report "stomach pain" after taking glutathione, they are typically referring to a range of gastrointestinal experiences