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The biological activity of GHK-Cu fundamentally depends on its sophisticated copper coordination chemistry, which enables safe and efficient cellular copper delivery while avoiding the toxicity associated with free copper ions
(PubMed) Yes allergic reactions from mild rash/itching to severe anaphylaxis have been reported
Compatibility depends on pH and vehicle
Glutathione is often called the body's "master antioxidant" because it helps protect cells from oxidative stress and supports normal liver detoxification pathways
Because of its role in cellular protection, glutathione levels are often linked to overall wellness, especially in contexts like immune support, skin appearance, and energy metabolism
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