What is the average pH of the skin?

The average pH of the skin typically falls within the range of 4.5 to 5.5. This slightly acidic pH is crucial for maintaining the skin's barrier function and overall health. The skin's acidity helps to inhibit the growth of harmful bacteria and fungi while supporting the presence of beneficial microorganisms. This natural acid mantle is essential for protecting against pathogens and environmental damage, and it plays a vital role in maintaining hydration and moisture levels within the skin.

When the skin's pH deviates from this range, it can lead to various skin issues, such as dryness, irritation, or increased susceptibility to infections. Therefore, understanding the normal pH range is important for estheticians and anyone involved in skin care practices, as it informs product selection and treatment approaches to maintain the skin's health and integrity.