Association between dietary copper intake and cognitive function in American older adults: NHANES 2011–2014. Dose–response analysis suggested an optimal copper intake level, with an inflection point of ~1.22 mg per day https://www.nature.com/articles/s41598-025-09280-9 Copper⟶Brain https://www.t-online.de/gesundheit/aktuelles/id_100825568/studie-zu-gehirnleistung-forscher-finden-verbesserung-durch-spurenelement.html