What is the normal pH range of skin?

The normal pH range of skin is typically between 4.5 and 5.5. This slightly acidic pH is crucial for maintaining the skin's natural barrier and overall health. The acidity helps to inhibit the growth of harmful bacteria and pathogens while supporting the skin's natural flora. A pH within this range promotes optimal enzymatic activity for processes like desquamation (shedding of dead skin cells) and provides protection against environmental irritants.

When the skin's pH strays from this range, it can lead to various skin issues. For instance, if the pH becomes more alkaline (as seen in the higher values) or too acidic (lower values), the skin barrier can become compromised, resulting in conditions such as eczema, dermatitis, or increased sensitivity.

Understanding the normal pH range is essential for managing skin health, particularly for older adults, who may experience changes in skin composition and barrier function. Maintaining the appropriate pH can aid in skincare formulations, body washes, and other topical treatments designed specifically for this population.