What is the dual-purpose benefit of a moisturizer?

A moisturizer serves a dual-purpose benefit primarily by hydrating and protecting the skin. Hydration is essential because moisturizers help to retain moisture within the skin, preventing it from becoming dry or dehydrated. This is particularly important for maintaining the skin's barrier function, which keeps it healthy and resilient.

Protection comes into play through the formation of a barrier that safeguards the skin from environmental aggressors, such as pollution, harmful UV rays, and harsh weather conditions. Many modern moisturizers also contain additional ingredients like antioxidants and SPF that enhance their protective qualities.

Other options focus on benefits that are not characteristic of moisturizers. For example, cleansing and exfoliating are functions typically associated with facial cleansers and exfoliants, rather than moisturizers. Similarly, while some products may help reduce oiliness or minimize pores, these are not the primary functions of a moisturizer. Therefore, the combination of hydration and protection accurately reflects the essential dual-purpose benefits of a moisturizer.