In which skin type are the acid mantle and barrier function typically unhealthy?

Dry skin is characterized by a compromised acid mantle and barrier function, which leads to an inability to retain moisture effectively. The acid mantle is a thin film of fatty acids and lactic acid that serves as a protective barrier for the skin. When the skin is dry, this barrier is often weakened, making it more susceptible to external irritants and environmental factors, which can exacerbate the dryness.

In individuals with dry skin, the lack of moisture results in a reduced production of natural oils, which can disturb the skin's natural balance and impair its ability to protect itself. Consequently, this can lead to increased sensitivity, irritation, and even conditions such as eczema or dermatitis. Therefore, understanding the unique challenges associated with dry skin is crucial for formulating appropriate skincare treatments that aim to restore moisture and strengthen the skin's barrier.