Massachusetts Board of Cosmetology Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

In hair care products, "pH" is crucial as it measures the acidity or alkalinity of a product on a scale that ranges from 0 to 14. A pH of 7 is considered neutral, while anything below that is acidic and anything above is alkaline. The hair and scalp have a natural pH that typically falls between 4.5 and 5.5, which is slightly acidic. This acidity is important for maintaining the health of hair, as it helps to keep the hair cuticles closed, reducing frizz and promoting shine.

When hair care products have a pH that is too high (alkaline), they can open the hair cuticle excessively, leading to damage, dryness, and breakage. Conversely, products with a pH that is too low can overly tighten the cuticle, making it difficult for moisture to penetrate the hair shaft. Using products with a balanced pH corresponds with the hair's natural state, ensuring that it remains healthy, manageable, and vibrant.

This understanding of pH is essential for cosmetologists, as they can choose products that will work in harmony with the client's hair type and needs, ultimately promoting better hair health and aesthetics. The other options, while related to aspects of hair