Caffeine influences metabolic rate by acting as a stimulant, which can temporarily increase energy expenditure. It enhances thermogenesis and may promote fat oxidation, making it beneficial for weight management. Consumption of caffeine before exercise can improve performance by increasing endurance and reducing perceived exertion. However, individual responses to caffeine vary, and excessive intake may lead to adverse effects such as anxiety or sleep disturbances. Thus, moderate caffeine consumption can be an effective tool for enhancing metabolic rate and exercise performance when used wisely.