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This study found that exposure to chlorine significantly reduced tensile properties in human hair compared to normal, while dyeing only affected some properties but not all.

In this study, researchers observed that even a single session of hair dyeing can damage hair fibers, with significant worsening of mechanical properties and protein composition after three or more consecutive treatments, emphasizing the need to consider the cumulative impacts of dyeing on hair health.

This study found that age-related hair thinning in Caucasian women over 50 involves significant structural changes within the hair follicle, suggesting an "aged hair program" rather than just producing thinner hairs.

This study observed that areola formation in mice requires exposure to pregnancy hormones and mechanical strain, beyond individual stimuli like hormonal milieu or strain alone.

This study found that UVB radiation primarily causes hair protein loss, while UVA radiation mainly contributes to hair color changes, with no significant differences in mechanical properties observed between photooxidized and non-irradiated hair.