What does the term 'pH' refer to in hair care?

The term 'pH' refers to the measure of hydrogen ion concentration in a solution. In hair care, pH is crucial because it indicates how acidic or alkaline a product is. The pH scale ranges from 0 to 14, with values below 7 being acidic, 7 being neutral, and above 7 being alkaline. Hair and scalp health can be significantly influenced by pH levels.

For instance, most hair care products are formulated with a pH level that matches the natural pH of hair and scalp, which is typically around 4.5 to 5.5. Using products with the correct pH can help maintain the cuticle layer of the hair in good condition, preventing damage, and ensuring that the hair remains healthy and shiny. When the pH level is too high (alkaline), it can cause the hair cuticle to swell and lift, leading to frizz and increased porosity. Conversely, an overly acidic product can potentially tighten the cuticle too much, which can also lead to issues. Understanding pH is fundamental for professionals in hair care to select appropriate products and treatments for their clients.