What role does nutrition play in maintaining functional status in older adults?

• A. Adequate protein and energy intake support muscle mass, immunity, wound healing, and function.
• B. Nutrition has little effect on function.
• C. Only vitamins matter.
• D. Hydration is the only factor.

Answer: (A)

Nutrition plays a major role in maintaining functional status in older adults by preserving muscle mass, supporting immune function, and aiding wound healing, all of which help preserve independence in daily activities. Adequate protein and energy intake are especially important. As people age, the body’s ability to build and repair muscle in response to meals can diminish, so getting enough high-quality protein and calories helps maintain lean mass, strength, and physical function, reducing frailty and improving activities like walking and climbing stairs. Sufficient energy also supports recovery from illness or injury, which is crucial for staying independent.

Hydration and micronutrients matter, but they can’t fully sustain function on their own; without enough protein and calories, muscle loss and functional decline still occur. So, focusing on ensuring adequate protein intake and overall energy balance provides the strongest foundation for preserving functional status in older adults.