What is the proper pH level for skin?

The proper pH level for skin typically falls within the range of 4.5 to 5.5. This slightly acidic pH is crucial for maintaining the skin's health and barrier function. A pH level in this range helps to support the skin’s natural defense mechanisms, including the lipid barrier and the skin microbiome, which protects against pathogens and environmental irritants. It also aids in the proper functioning of enzymes that are involved in skin cell turnover and hydration processes.

Beyond this optimal range, skin may become more vulnerable to irritation, dryness, or infections. For instance, a pH level that is too acidic or too alkaline can disrupt the skin's natural balance, leading to issues such as sensitivity or conditions like acne and eczema. Keeping the skin within the 4.5 to 5.5 range is essential for overall skin health and resilience.