What is a common consequence of inadequate protein intake in older adults?

Inadequate protein intake in older adults often leads to the loss of muscle mass, a condition known as sarcopenia. As people age, maintaining muscle strength and mass becomes increasingly important for overall health, mobility, and the ability to perform daily activities. Protein is essential for muscle repair and growth, and insufficient protein consumption can result in a decrease in muscle protein synthesis. This reduction not only affects physical functioning but can also lead to increased frailty and a higher risk of falls, hospitalizations, and other health complications.

The other options do not align with the typical consequences of low protein intake. For instance, increased metabolic rate usually requires adequate protein and calorie intake for proper functioning, while improved digestion and enhanced immune function are not commonly associated with insufficient protein levels. Instead, inadequate protein can impair immune response and digestive health, making muscle mass loss the most relevant consequence in this context.