Influence of Oxidative and Reductive Treatment on Human Hair: Analysis of Hair Damage
January 2003
in “
Journal of oleo science
”
oxidative treatment reductive treatment perming bleaching UV irradiation brushing detergent treatment drying heating cuticle layer reduction scale lift hair swelling cysteic acid protein elution melanin granule solubilization cuticle layers cortex medulla perm bleach UV exposure hair brushing shampooing hair drying hair heating
TLDR Chemical treatments and daily stresses damage hair, especially the cuticle layer.
In a study from 2003, researchers developed a damaged hair model to investigate the effects of chemical, physical, and environmental stress on human hair. They subjected hair to oxidative and reductive treatments, such as perming and bleaching, as well as physical and environmental stresses including UV irradiation, brushing, detergent treatment, drying, and heating. The study found that these everyday stresses caused morphological changes like cuticle layer reduction, scale lift, and hair swelling, as well as changes in hair composition, including increased cysteic acid and protein elution, and melanin granule solubilization. The damage was more pronounced with stronger chemical treatments and was particularly significant in the cuticle layers compared to the cortex and medulla of the hair. This demonstrated that both daily life stresses and chemical treatments contribute to hair damage, with the effects being amplified by the degree of chemical treatment.
