The Impact of Lifestyle on Brain Health.

Abstract

Brain health is profoundly influenced by lifestyle factors, offering promising avenues for the prevention and mitigation of various brain health issues, including age-related cognitive decline. This review examines evidence on how key lifestyle modifications, including diet, exercise, sleep, stress management, social engagement, exposure to toxic environmental factors, risky behaviors, and cognitive training, affect brain health. Historical background is provided, but original articles published within the past 6 years that discuss lifestyle medicine are the focus of this review. The main topics covered are how Mediterranean, Nordic, and vegetarian diets support cognitive resilience, how physical exercise (aerobic and anaerobic) enhances neuroplasticity, and explain sleep's role in metabolic clearance. In contrast, persistent stress leads to hippocampal atrophy, and toxic environmental exposures and head injury increase dementia risk. Other lifestyle modifications, such as meditation and social support, can mitigate these impacts. Cognitive reserve, built through lifelong learning and social interaction, provides resilience against neurodegeneration. While these strategies on their own hold value, personalized multimodal interventions have proven to be the most effective approach for promoting overall brain health and attenuating age-related cognitive decline.