What characteristic of hair indicates lower chemical absorption?

The status of the cuticle layer is a critical factor in determining a hair strand's ability to absorb chemicals. The cuticle is the outermost layer of the hair shaft, consisting of overlapping scale-like cells that protect the inner layers of the hair. When the cuticle layer is intact and healthy, it lays flat and creates a barrier that can inhibit the penetration of chemicals. This leads to lower chemical absorption.

On the other hand, if the cuticle is damaged or raised, it allows for greater chemical exposure and absorption. Therefore, the condition of the cuticle directly influences how readily chemical treatments can penetrate the hair. A smooth, healthy cuticle minimizes chemical absorption, while a compromised cuticle makes the hair more susceptible to absorbing treatments and products.

Hair texture, length, and density may influence how a product might perform or feel on the hair, but they do not directly dictate the level of chemical absorption like the cuticle status does. Understanding the role of the cuticle helps professionals in determining the best approaches for hair treatments and maintaining hair health.