Nutrition refers to the process by which an organism takes in and uses food for growth, maintenance, and repair of tissues. It encompasses all aspects of the ingestion, digestion, absorption, transport, and metabolism of nutrients and the elimination of waste products. Nutrition is essential for maintaining good health, preventing disease, and promoting optimal physical and mental functioning. It involves understanding the different types of nutrients required by the body, their sources, functions, and recommended intakes. A balanced and varied diet that meets the body’s nutritional requirements is key to achieving good health and preventing malnutrition and chronic diseases.