Nutrient metabolism refers to the biochemical processes that convert food into energy and essential compounds for the body. It involves the digestion, absorption, and utilization of nutrients, including carbohydrates, proteins, fats, vitamins, and minerals. Metabolic pathways break down these nutrients to release energy and synthesize necessary biomolecules. This process is crucial for maintaining homeostasis, supporting growth, and promoting overall health. Various factors, such as age, sex, physical activity, and genetic predisposition, influence nutrient metabolism. Understanding these processes allows researchers to explore how dietary choices affect health outcomes, develop nutritional interventions, and address metabolic disorders. Advancements in metabolomics are providing insights into nutrient metabolism at the cellular level, paving the way for personalized nutrition strategies.