What is the pH level of neutral hair?

The pH level of neutral hair typically falls within the range of 4.5 to 5.5. This slightly acidic pH is important for maintaining the health and integrity of the hair. At this level, the hair cuticles remain closed and intact, which is crucial for preventing moisture loss and damage. This balanced pH helps keep the hair smooth and shiny, as well as minimizing frizz and breakage.

A pH level lower than 4.5 could indicate an overly acidic environment, which may lead to potential damage and weakening of the hair structure. Conversely, a higher pH level above 5.5 may lead to an alkaline environment, which can lift the cuticle and make the hair more porous and prone to damage.

Understanding this range is vital for cosmetology professionals when selecting products and treatments for different hair types, as using formulations that respect this pH balance will result in healthier, more manageable hair.