Reactive oxygen species (ROS) are closely associated with brain dysfunction, particularly cognitive decline, which often accompanies aging. Antioxidant supplementation is a promising strategy to mitigate these effects [1,2]. In this study, we investigated the effects of Twendee X, a combination antioxidant supplement containing eight active ingredients, on cognitive and motor functions in middle-aged mice. Male C57BL/6 mice (49 weeks old) were administered Twendee X orally for one month. Behavioral assessments using the Morris water maze test revealed significant improvements in spatial memory, while the Rota-rod test indicated enhanced motor coordination. To explore the potential mechanisms underlying these effects, we performed western blot analyses of neurotrophic factors in the brain; however, no significant changes were detected among the experimental groups. These results suggest that combination antioxidant supplementation may enhance brain function in aging individuals, although the precise molecular mechanisms remain to be elucidated. Regular antioxidant intake may contribute to the prevention of age-related cognitive and motor decline.