20 citations
,
January 2015 in “Journal of cosmetic dermatology” This study found that as Japanese women age, their hair cuticle becomes more prone to damage, shifting from type L to type E damage patterns, and hair surface properties, including fatty acid content, deteriorate.
10 citations
,
July 2015 in “Clinical and Experimental Dermatology” The authors reported a possible association between the use of etanercept and the development of trichorrhexis nodosa, a hair shaft disorder, in a patient without apparent external causes.
4 citations
,
January 2017 in “Annals of Dermatology” Frequent hairdryer use may worsen hair fragility in people with Pili Annulati.
December 2025 in “Biopolymers” This study found that chemically treated hair, particularly when subjected to both acid straightening and bleaching, experiences more significant structural damage when exposed to heat, highlighting key changes in both the internal and surface components of hair fibers.
4 citations
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November 2016 in “The Journal of Dermatology” This study found that the weak tensile strength of pili torti hair may result from loose keratin intermediate filaments due to abnormalities in disulfide bonds.