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Once phosphorylated, HSL appears to expose more hydrophobic regions

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This decline correlates with visible aging signs, reduced wound healing capacity, and decreased tissue regeneration, providing the rationale for supplementation

It is typically associated with more targeted cosmetic applications such as: Scalp-focused serums Hair appearance and density-support formulations Specialized peptide blends for haircare systems Compared to GHK-Cu, AHK-Cu is generally considered more niche and formulation-specific , especially in hair and scalp-oriented cosmetic products