New Jersey Cosmetology and Hairstyling Practice Exam

What is the typical pH range for hair products?

1. 0-2

2. 3-5

3. 6-8

4. 9-12

The correct answer is: 3-5

The typical pH range for hair products is 3 to 5. This range is considered optimal for maintaining the health and integrity of the hair. Hair is naturally slightly acidic, and products that fall within this pH range help to keep the cuticle (the outer layer of the hair) smooth and closed. This not only enhances shine but also protects the hair from damage, as a more acidic pH can prevent the hair from becoming too porous and brittle. When hair products are formulated to have a pH that aligns with this range, they help to ensure that hair remains in good condition and retains moisture effectively. Products that are too alkaline can raise the cuticle, leading to frizz, dryness, and increased susceptibility to damage. Therefore, a pH range of 3 to 5 is ideal for most hair care products, as it supports the natural balance of hair while promoting overall health and manageability.