Red Seal Hairstylist Practice Exam

The typical pH level range of hair is between 4.5 to 5.5. This range is crucial for maintaining the health and integrity of the hair structure, as it represents a slightly acidic environment. The natural acidity helps to keep the hair cuticle smooth and closed, which in turn helps to retain moisture and keep the hair looking shiny and healthy.

When hair is within this pH range, the proteins and keratin that make up the hair strand are less likely to be damaged. Using products with a similar pH level can help preserve this balance, while products with significantly higher pH levels can lead to cuticle lifting, making the hair more prone to damage and breakage.

Understanding the pH level of hair is essential for hairstylists and barbers when selecting products for clients, as well as when recommending aftercare, to ensure that hair remains healthy and manageable.