This study suggests that holes found in mature hair fibers may be linked to daily hair care actions and the removal of extractable substances.
15 citations
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October 2004 in “Colloids and surfaces. B, Biointerfaces” This study describes the presence of holes in hair fibers, absent in hair follicles, likely forming from daily care actions and removal of extractable substances.
40 citations
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April 1999 in “Journal of Histochemistry & Cytochemistry” In this study, the researchers identified the specific subcellular localization of the protein S100A3 in the endocuticle and cortex of human hair shafts.
12 citations
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July 2016 in “Forensic science international” This study found that postmortem root banding in hair is likely due to the degradation of the intermacrofibrillar matrix in the cortex, with no damage to the cuticle observed.
11 citations
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January 2000 in “Journal of cosmetic science” This study found that hydrolyzed wheat proteins extensively penetrated both untreated and chemically treated hair, primarily occupying areas like the endocuticle and cortex.