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Case reports of kidney and liver toxicity have been reported when used in high doses in young men
In contrast, GHK-Cu is generally non-irritating and safe for most skin types
Keywords Information Type Research Article Information Copyright The Author(s), 2026
[36] Antibodies to intrinsic factor and parietal cells cause the destruction of the oxyntic gastric mucosa, in which the parietal cells are located, leading to the subsequent loss of intrinsic factor synthesis
Possible symptoms may include fatigue, weakness, tingling sensations and difficulty concentrating
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