A plant extracts for improving mitochondrial activity is provided. The plant extracts which comprises plant polyphenols can effectively improve the ability of ATP produced in mitochondrion.本發明係關於一種提升粒線體活性之植物萃取物,其中該植物萃取物係包含一植物多酚。本發明所述植物萃取物能有效提升粒線體製造ATP的能力。