How does dehydration affect the nails?

Dehydration negatively impacts the nails by leading to brittleness and splitting. Nails are composed of layers of keratin, and when they lose moisture, they become dry and less flexible. This lack of hydration can cause the nails to break or split more easily, resulting in a rough appearance and potential discomfort. Maintaining proper hydration is essential for the overall health of the nails, contributing to their strength and resilience. The other options do not accurately reflect the effects of dehydration on nails, as they suggest improvements or enhancements that do not occur when nails are dehydrated.