New Jersey Cosmetology and Hairstyling Practice Exam

The typical pH range of hair care products, specifically between 4.5 to 5.5, is ideal for maintaining the health of the hair and scalp. Hair is naturally slightly acidic, and products formulated within this pH range help to keep the hair cuticle closed, which prevents damage and maintains moisture. This pH balance helps to ensure the hair stays shiny and healthy while minimizing frizz and breakage.

When products are too acidic (in the lower pH range of 1-4), they may be overly harsh and can lead to hair becoming brittle and dry. Conversely, products with a higher pH range (like 6-8 or 7.5-9.5) may open the hair cuticle too much, leaving hair vulnerable to environmental damage, dehydration, and a loss of natural oils.

In summary, the pH range of 4.5 to 5.5 is not only optimal for the hair's health but also aids in the overall effectiveness of the product in cleansing, conditioning, and styling, making it the best choice for consumers looking after their hair care routine.