How can metabolism be defined?

Metabolism can be defined as the process of converting food into energy. This definition encompasses the various biochemical reactions that occur within cells to break down nutrients from the food we consume. During metabolism, macronutrients such as carbohydrates, proteins, and fats are transformed into adenosine triphosphate (ATP), the energy currency of cells. This energy is essential for maintaining physiological functions, supporting growth, repairing tissues, and enabling all bodily activities.

Understanding metabolism is crucial in contexts such as nutrition, health, and exercise physiology as it highlights the significance of energy balance and the role that diet plays in overall health. This process is fundamental to life, as it allows organisms to harness and utilize energy from the environment to sustain cellular processes and bodily functions.