GHK-Cu a copper tripeptide your body produces naturally sits at roughly 200 ng/ml in your bloodstream at age 20, and drops to less than 80 ng/ml by age 60. That decline doesn't just show up as slower skin repair
This detoxification pathway helps the body to eliminate harmful substances and reduce the burden of oxidative stress on cells and tissues
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Determining the right glutathione dose for your specific situation requires understanding your baseline oxidative stress markers, metabolic profile, and how your genetics influence antioxidant pathway function
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Such a study would either confirm the inferential case from the broader microneedling and growth-factor literature or surface boundary conditions where the at-home protocol underperforms expectations