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GHK-Cu levels in the body decline significantly with age, which is one reason it has attracted interest in longevity and tissue repair research

Author contributions Mahmoud Hussein Hadwan (Conceptualization [equal], Data curation [equal], Formal analysis [equal], Funding acquisition [equal], Investigation [equal], Methodology [equal], Project administration [equal], Resources [equal], Software [equal], Supervision [equal], Validation [equal], Visualization [equal], Writingoriginal draft [equal], and Writingreview & editing [equal]), Abbas Ali Mohammed (Data curation [equal], Investigation [equal], Methodology [equal], Software [equal], and Writingreview & editing [equal]), Saeed Najavand (Data curation [equal], Project administration [equal], Resources [equal], Software [equal], Supervision [equal], Investigation [equal], Methodology [equal], and Writingreview & editing [equal]), Roaa Altaee (Investigation [equal], Methodology [equal], Validation [equal], and Writingreview & editing [equal]), and Asad Hadwan (Data curation [equal], Formal analysis [equal], Investigation [equal], Methodology [equal], Validation [equal], and Writingreview & editing [equal]) Conflicts of interest None declared

This suggests that SIRT7 may be a potential target for therapeutic intervention aimed at preserving cognitive function in the elderly 102

Oral Bioavailability and Metabolism of Hydroxytyrosol from Food Supplements