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The GHK sequence also appears within the alpha-2(I) chain of type I collagen, leading to the hypothesis that collagen degradation at wound sites releases GHK fragments that then bind copper and signal for new collagen production, creating a self-repair feedback loop
Its proven effective for both
In a 2015 journal article, Richie and his colleagues described that regular intake of glutathione significantly decreased oxidative stress, while natural killer cytotoxicity increased in participants given high doses of the substance
doi:10.1007/s10637-014-0189-z
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