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GHK-Cu is frequently studied in regenerative and cosmetic research models because it connects copper peptide activity with dermal signaling, extracellular matrix structure, and tissue-remodeling pathways

In SFN studies, this is the window where nerve fiber density begins to statistically improve

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Large, well-designed Phase II/III RCTs with distinct primary goals, uniform diagnostic criteria, and active comparators are needed

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Administration Recommended routes vary by compound: many fertility peptides use subcutaneous or intramuscular injection