63 citations
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August 1996 in “Forensic Science International” In this study, bleaching and perming were found to significantly reduce opiate concentrations in both spiked and naturally opiate-positive human hair samples.
February 2019 in “PubMed” This study explores torsional measurements of single hair fibers to differentiate the effects of cosmetic treatments on hair structure, highlighting their potential to reveal shear stiffness changes related to cuticle damage.
3 citations
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September 2005 in “International Journal of Cosmetic Science” This study found that monounsaturated oils like olive oil penetrate hair fibers effectively, whereas polyunsaturated oils typically do not penetrate beyond the cuticle.
January 2020 in “Indian dermatology online journal” Hair styling products can damage hair over time.
75 citations
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December 2011 in “British Journal of Dermatology” This review discusses female pattern hair loss, its psychological impact, and available treatments but provides no new clinical findings; the authors emphasize early intervention for better outcomes.