Metabolism/məˈtæbəlɪzəm/ Definition 1 of 2Pro Tip 1/3Energy Conversion Focus on the aspect that metabolism transforms food to energy we can use. Eating protein-rich foods might improve your metabolism. Pro Tip 2/3Physical Wellbeing Metabolism is often discussed in relation to health, diet, and exercise. To lose weight, boosting your metabolism is often recommended. Pro Tip 3/3Daily Usage The word 'metabolism' is commonly used in everyday conversation about health. She can eat a lot without gaining weight—must be her fast metabolism.