Nutrition is the process by which the body obtains and utilizes food for growth, energy, repair of tissues, and maintenance of overall health. It includes the intake, digestion, absorption, transportation, metabolism, and excretion of nutrients. Proper nutrition ensures that the body receives all the essential nutrients in the right quantities. These nutrients include carbohydrates, proteins, fats, vitamins, minerals, water, and dietary fiber. Carbohydrates provide energy, proteins help in growth and tissue repair, fats supply concentrated energy and support cell functions, vitamins and minerals regulate body processes, while water is essential for hydration and metabolic activities. Good nutrition is a fundamental requirement for physical, mental, emotional, and social well-being throughout life. Malnutrition is a condition that occurs when the body does not receive adequate, balanced, or appropriate nutrients. It includes both undernutrition and overnutrition, although undernutrition is more common in developing countries. Undernutrition may result in underweight, stunted growth, wasting, weakened immunity, delayed development, anemia, and increased susceptibility to infections. Children, pregnant women, lactating mothers, and elderly individuals are particularly vulnerable to malnutrition. Common causes include poverty, food insecurity, poor feeding practices, lack of nutrition education, repeated infections, poor sanitation, inadequate healthcare, and social inequalities. Treatment of malnutrition depends on its severity and underlying cause. The first step is assessing the nutritional status through physical examination, medical history, and anthropometric measurements. Mild to moderate malnutrition can often