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Open question Whether the same mechanisms are clinically meaningful in humans is not yet established
Evidence supports modest improvements in skin firmness, elasticity, and fine lines over 812 weeks of consistent use
The Human Tripeptide GHK-Cu in Prevention of Oxidative Stress and Tissue Remodeling (Pickart et al., 2012) This article reviews how GHK-Cu has anti-oxidant, anti-inflammatory, and regenerative effects across multiple tissue types, including skin and potentially internal tissues
This enormous safety margin explains why serious adverse effects remain essentially unreported in the research literature
The most frequently reported effects include temporary redness at the injection site, mild nausea, lightheadedness, and skin flushing
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