Factors that can influence the metabolism of an individual include age, gender, muscle mass, and hormonal levels. Generally, younger individuals tend to have a higher metabolic rate. Men often have higher rates than women due to differences in body composition. Genetics also play an essential role, affecting how efficiently a person burns calories. Lifestyle factors such as physical activity levels, diet, and sleep quality can further influence metabolism. Recognizing these factors is crucial for effectively managing weight and overall health.