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GHK-Cu is frequently researched alongside compounds such as: Zinc Vitamin C because of their involvement in: Collagen-related pathways Skin-integrity mechanisms Antioxidant-support systems Tissue-maintenance signaling Because GHK-Cu is a copper-binding peptide, prolonged or higher-frequency research exposure may influence copper- and zinc-related balance in certain research settings
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The most common side effects include nausea affecting 15-44% of users, diarrhea in 10-30%, vomiting in 7-25%, and constipation in 6-24%
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