How does hydration influence skin health?

• A. Hydration increases oil production.
• B. Hydration has no effect on the skin.
• C. Hydration maintains barrier function, elasticity, and reduces sensitivity.
• D. Hydration dries out the skin.

Answer: (C)

Hydration keeps the outer skin layer, the stratum corneum, plump with water. When this layer is well hydrated, the skin’s barrier stays intact, its lipids and natural moisturizing factors work effectively, and the cells retain flexibility. This stronger barrier reduces transepidermal water loss and limits irritant penetration, which helps the skin feel less sensitive and prone to irritation. Hydration also supports elasticity—water helps keep the skin turgid and supple, so it looks smoother and more resilient.

Oil production is driven mainly by the sebaceous glands and hormonal factors, not by skin water content, so hydration won’t increase oil production. Hydration doesn’t dry the skin; dryness results from water loss or insufficient moisture; keeping the skin hydrated actually combats that dryness.