What is a common effect of dehydration on the skin?

Dehydration significantly impacts the skin's appearance and texture, primarily resulting in dry and flaky skin. When the body does not have enough water, the skin loses its natural moisture, which can lead to a rough texture and the formation of visible flakes. This lack of hydration can hinder the skin's ability to maintain its barrier function, making it more prone to irritation and dryness.

In contrast to the other answers, oily texture, increased elasticity, and a glowing appearance are typically associated with well-hydrated skin. An oily texture may occur due to overactive sebaceous glands, while increased elasticity and a glowing complexion generally result from adequate moisture and proper skin health. Therefore, dry and flaky skin is the expected consequence of dehydration, highlighting the importance of maintaining proper hydration for skin health.