Arizona Cosmetology Practice Exam

What is the function of an acid balance shampoo?

1. To restore the natural pH level of the hair and scalp

2. To eliminate dandruff

3. To add shine to the hair

4. To remove excess oil

The correct answer is: To restore the natural pH level of the hair and scalp

An acid balance shampoo is specifically designed to restore the natural pH level of both the hair and scalp. The hair’s natural pH level typically ranges from 4.5 to 5.5, which is slightly acidic. This acidity helps to keep the hair cuticle closed, thereby promoting shine, managing moisture balance, and reducing damage from environmental factors. Using a product that balances pH is important following chemical treatments such as coloring or perming, which can upset the hair’s natural balance, leading to dryness, breakage, or an unmanageable texture. An acid balance shampoo helps in maintaining the proper equilibrium, ensuring healthier hair and scalp conditions. While other products may focus on eliminating dandruff, adding shine, or removing excess oil, the primary and most significant function of an acid balance shampoo is to restore and maintain that natural, healthy pH level. Therefore, its role is integral in a proper hair care routine.