Undernutrition occurs when an individual does not receive enough nutrients, leading to deficiencies in essential vitamins and minerals. This condition can result from inadequate food intake, poor dietary choices, or health issues that affect nutrient absorption. It is particularly concerning in vulnerable populations, such as children and the elderly, as it can hinder growth and development. The effects of undernutrition can be severe, including weakened immune function, stunted growth in children, and increased susceptibility to diseases. Addressing undernutrition often involves improving access to nutritious food, education on healthy eating, and healthcare support to manage underlying health conditions.