What is the pH range of hair and skin?

The pH range of hair and skin typically falls between 4.5 and 5.5. This slightly acidic environment is crucial for maintaining healthy hair and skin. The natural acidity helps to protect the skin barrier and hair cuticle, preventing excessive moisture loss and creating an inhospitable environment for harmful microorganisms.

When the pH is in this range, the hair cuticles lie flat, which helps to keep the hair smooth and shiny while also promoting scalp health. Products formulated within this pH range are better suited to maintain the integrity of hair and skin, reducing the likelihood of irritation and damage.

Understanding this pH range is particularly important for cosmetology professionals, as it influences product selection and application techniques to ensure optimal results for clients.