Washington Master Esthetics Practice Exam

How do AHAs assist in resolving issues related to dry skin?

1. Hydrate the skin

2. Thicken the stratum corneum

3. Thin the stratum corneum

4. Moisturize deeper layers of skin

The correct answer is: Thin the stratum corneum

AHAs, or alpha hydroxy acids, play a significant role in addressing dry skin by thinning the stratum corneum, the outermost layer of the skin. This process involves the exfoliation of dead skin cells that accumulate on the surface, which can contribute to a dull and dry appearance. By effectively loosening the bonds between these dead skin cells, AHAs encourage their removal, leading to smoother and more refined skin texture. This thinning effect promotes cell turnover, allowing fresh, healthy skin cells to come to the surface more readily. As a result, the skin can appear more hydrated and luminous because the newer, unblemished cells replace the older, rougher ones. Additionally, the exfoliation can enhance the absorption of moisturizers and treatments applied subsequently, leading to improved hydration levels overall. The other options provide some misleading implications. While AHAs are beneficial for skin texture and hydration, they do not inherently hydrate the skin or moisturize deeper layers directly. They do not thicken the stratum corneum; rather, their exfoliating properties are focused on reducing the buildup of dead skin, thereby facilitating a healthier skin cycle.