What is a key indicator of hair damage?

High porosity is a key indicator of hair damage because it signifies that the hair cuticles, which normally lie flat, are lifted or damaged. This lifting allows moisture and other substances to enter and exit the hair shaft more readily. In healthy hair, the cuticle layers are tightly bound, promoting a smooth and shiny appearance. However, when hair is damaged, whether from chemical processes, heat styling, or environmental factors, the structure becomes compromised, resulting in increased porosity.

High porosity can lead to various issues such as dryness, brittleness, and a lack of luster in the hair, which are common signs of damage. In contrast, smooth texture, consistent color, and shiny appearance are typically characteristics of healthy hair, making them less reliable indicators of damage. Understanding porosity can greatly assist in choosing appropriate hair care products and treatments to restore hair health.