A method of protecting and repairing mitochondria includes providing an extraction of bilberry to a cell so that the ability of performing the oxidative phosphorylation for the synthesis of the adenosine triphosphate (ATP) by mitochondria in the cell is improved. The extraction of bilberry contains anthocyanidins.一種保護與修復粒線體的方法,包含提供含有花青素(Anthocyanidins)之山桑子(Bilberry)萃取物予細胞的步驟,用以提高細胞內的複數個粒線體進行氧化磷酸化反應合成三磷酸線苷的能力。