Effects of ultraviolet rays and particulate matter on hair porosity in damaged hair.

Background: With growing interest in hair health, researchers are exploring aspects beyond the surface qualities of hair, such as its porous inner structure. While previous studies have focused on the effects of treatments such as perming and hair dying on hair porosity, less emphasis has been paid to the effects of harmful environmental factors such as ultraviolet (UV) rays and particulate matter on the porous nature of hair.

Aims: The aim of this study was to bridge this gap by investigating how UV rays and particulate matter affect hair porosity in different ways.