What is the main function of a moisturizer?

• A. To exfoliate dead skin cells
• B. To hydrate the skin and maintain its barrier function
• C. To provide sun protection
• D. To darken the skin tone

Answer: (B)

The main function of a moisturizer is to hydrate the skin and maintain its barrier function. Moisturizers work by adding water to the skin's outer layer, which helps to prevent dryness and maintain a healthy moisture balance. This hydration is essential because it supports the skin’s natural barrier, which protects against environmental stressors and reduces trans-epidermal water loss.

A well-functioning barrier is crucial for keeping skin healthy, plump, and resilient, ultimately contributing to its overall appearance and feel. Hydrated skin is also less prone to irritation and premature aging. Moisturizers can contain various ingredients that enhance hydration and lock in moisture, emphasizing their role in skincare routines aimed at maintaining optimal skin health.