How does the pH of skin typically range?

The skin's pH typically ranges from 4.5 to 5.5, making it slightly acidic. This acidic environment plays several critical roles in skin health and overall function. The appropriate pH helps to maintain the skin barrier, which is vital for protecting the body from external pathogens, pollutants, and allergens. An optimal skin pH also supports the activity of certain enzymes that are essential for the skin's natural exfoliation process and moisture retention.

Additionally, skin's acidity helps inhibit the growth of harmful bacteria and fungi while allowing beneficial microorganisms to thrive, contributing to an overall healthy skin microbiome. Understanding this range is essential for professionals in esthetics to ensure that the products and treatments they utilize do not disrupt this delicate balance, which could lead to irritation, sensitivity, or other skin issues.