What does the acid mantle do for the skin?

The acid mantle plays a crucial role in protecting the skin by acting as a barrier on its surface. This thin film of fatty acids and lactic acid maintains the skin’s pH at around 4.5 to 5.5, which is slightly acidic. This acidity is vital because it helps to inhibit the growth of harmful bacteria and fungi, thus providing a first line of defense against pathogens and environmental aggressors. Additionally, the acid mantle aids in retaining moisture within the skin, contributing to overall skin health and integrity.

While benefits such as hydration are associated with the overall function of the skin, the primary focus of the acid mantle is its protective barrier role. Cleanser functions pertain more to specific products designed to remove impurities rather than the natural barrier formed by the acid mantle. Lastly, an increase in skin pH would compromise the acid mantle's effectiveness, making the skin more vulnerable to damage and irritation.