Nutrition is the scientific study of the processes by which living organisms obtain, assimilate, and utilize food and nutrients necessary for growth, maintenance, reproduction, and health. It involves the intake of food, its digestion, absorption, transport, assimilation, and excretion, as well as the physiological and biochemical processes that transform food substances into energy and body tissues.
Proper nutrition is essential for maintaining health, preventing disease, and supporting optimal physical and mental function. It encompasses the nutrients found in food, such as carbohydrates, proteins, fats, vitamins, minerals, and water, and their roles in the body.