During a facial treatment, which product would likely be used to balance the skin's moisture levels?

Using a moisturizer during a facial treatment is essential for balancing the skin's moisture levels. Moisturizers are specifically formulated to hydrate the skin, providing essential water content and helping to prevent dryness. They often contain ingredients that work to lock in moisture, enhancing the skin's barrier function. This is particularly important during facials, as various treatments may temporarily disrupt the skin's natural moisture levels.

In contrast, a clay mask typically draws excess oil from the skin and may be more suitable for those with oily or acne-prone skin rather than for moisture restoration. An exfoliant works by removing dead skin cells, which can promote cell turnover but does not directly add moisture. A protective serum may offer benefits such as antioxidants or other active ingredients but is not primarily designed to address moisture balance. Therefore, the moisturizer stands out as the most effective choice for maintaining and balancing the skin's hydration during a facial treatment.