What is the natural pH range of the skin?

The natural pH range of the skin is typically between 4.5 and 6.5. This slightly acidic environment is important for maintaining the skin's barrier function and overall health. An acidic pH helps to inhibit the growth of harmful bacteria and fungi, while supporting the presence of beneficial microorganisms that contribute to a healthy skin microbiome.

In this context, skin's acidity is vital for enzymatic activities and the prevention of skin issues such as infections or irritations. The pH level is influenced by the skin's natural oils and sweat, which contain acids that contribute to the overall acidic pH. Maintaining this natural pH is essential for the skin’s resilience and overall homeostasis.

The other options do not position the skin within its natural pH range; a pH of 7 is neutral and does not reflect the skin’s natural acidity, while the values of 2 and 3.5-7 extend beyond or incorrectly include the typical range without focusing on the most commonly recognized values.