What factors would give a person a higher metabolic rate?

A higher metabolic rate can be influenced by several factors, including genetics, age, and body composition. Individuals with more muscle mass tend to have a higher metabolic rate because muscle tissue burns more calories at rest than fat. Additionally, younger individuals generally have a faster metabolism due to higher levels of growth hormones and greater overall activity levels. Hormonal factors, such as thyroid function, and lifestyle choices like physical activity and diet can also significantly impact metabolic rate.