What is a common characteristic of alkaline hair products?

Alkaline hair products are characterized by having a high pH, which typically ranges above 7. This elevated pH level is significant because it opens the hair cuticle, allowing for better penetration of the product into the hair shaft. When hair products are alkaline, they can effectively alter the hair structure, making them particularly useful in processes such as chemical relaxers, hair dyes, and permanent waves, where penetration and alteration of the hair’s natural state are necessary.

In contrast, other characteristics such as less effectiveness, closing the cuticle, or being specifically formulated for sensitive scalps do not apply to alkaline products. Products that are designed to be less effective or specifically suited for sensitive scalps often have a more balanced or slightly acidic pH, which helps to close the cuticle and maintain the health and integrity of the hair and scalp.