Low energy intake impairs an individual's ability to meet requirements for essential nutrients. Consequently, health professionals should encourage older adults to consume nutrient-dense foods. Anorexia of aging increases mature adults' risk of protein-energy malnutrition. Poverty is a major social cause of food insecurity and weight loss.
Depression is a major psychologic contributor to weight loss in older adults.
Drug-nutrient interactions can also contribute to nutritional deficiencies in adults. Some age-related physiological changes can be minimized by lifestyle changes.