As people age, their bodies change. Older adults tend to lose bone mass, muscle mass, and body water. At the same time, body fat often increases. Some muscles used for chewing and swallowing become weaker. Losing teeth also makes chewing harder, even with dentures. Older adults may also become less active and lose their appetite.

This can happen because of illness, medications, or emotional and money problems. All of these changes can lead to poor eating and poor health.