What is a common cause of undernutrition in elderly individuals?

Poor dental health is a significant contributor to undernutrition in elderly individuals. As people age, they may experience various dental problems such as tooth decay, gum disease, and ill-fitting dentures. These issues can make it difficult and painful for seniors to chew and adequately consume a balanced diet, leading to reduced food intake and, consequently, undernutrition.

When dental health deteriorates, it can result in a preference for softer, less nutritious foods, a decreased ability to obtain necessary nutrients, and a reluctance to eat socially, which further exacerbates the risk of nutritional deficiencies. Addressing dental health issues in older adults is crucial not just for maintaining oral hygiene but also for ensuring they can meet their nutritional needs effectively.

The other options, while potentially relevant in a broader context, do not directly link to the specific issue of undernutrition in the same manner. Overeating and excessive snacking typically lead to weight gain rather than undernutrition, while increased metabolism is not a common concern for the elderly, as many experience a decrease in metabolic rate with age.