Which nutrient is considered essential for maintaining skin integrity in older adults?

Protein plays a critical role in maintaining skin integrity, especially in older adults. It is essential for the synthesis of collagen, elastin, and other structural components of the skin. As we age, the body's natural production of collagen decreases, which can lead to skin thinning, wrinkles, and decreased elasticity. Adequate protein intake helps to support the repair and maintenance of skin tissue, which is vital for preserving its strength and function.

In older adults, protein needs may be heightened due to factors such as muscle loss and changes in metabolism. Ensuring sufficient protein consumption can aid in maintaining not only skin health but also overall physical health, as it supports muscle mass and immune function.

Other options, while important, do not address skin integrity in the same direct manner. For instance, vitamin C is crucial for collagen formation and the body's antioxidant defense, but it works best in conjunction with protein. Calcium is vital for bone health and not directly related to skin structure, while fiber is essential for digestive health but does not play a significant role in skin integrity. Therefore, protein is the key nutrient specifically linked to maintaining skin integrity in older adults.