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In this study, the bending stiffness of human hair was linked to the varying proportions of para-like versus ortho-like cortical cells within the hair fiber.

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.

In this study, the researchers identified the specific subcellular localization of the protein S100A3 in the endocuticle and cortex of human hair shafts.

This review explains the mechanical composition and molecular interactions that determine hair's mechanical properties, without providing any new experimental findings.

This research examined the ultrastructure of deer hair fibers and found significant variations in diameter, cuticle thickness, and intermediate filament arrangements among different fiber types.

This review discusses the development and types of hair and nails as skin appendages and reports no new research findings.

This article reports electron microscope studies on the structure of hair and wool, but it does not present new clinical findings.

This source highlights the utility of cationic polymers in haircare products for protecting against hair damage from chemical treatments and grooming, and describes how microfluorometry can measure polymer deposition and penetration on hair fibers.

This study used rapid-freezing immunocytochemistry to successfully map the ultrastructural localization of hair keratins in human scalp hair, primarily finding them in macrofibrils in the cortex and endocuticle.

This review explores the potential of herbal therapies and modern delivery methods for managing premature hair greying, highlighting promising plant-based treatments and emphasizing the need for clinical trials to validate their effectiveness.

In this study, bleaching and perming were found to significantly reduce opiate concentrations in both spiked and naturally opiate-positive human hair samples.

This article reviews the role of trichoscopy in diagnosing hair weathering conditions like trichorrhexis nodosa and trichoptilosis and suggests treatment by avoiding harmful chemical and physical factors, but it provides no new research findings.

This article discusses the characteristics of human hair, its damaging processes, and the potential repair effects of immuno-cosmeceuticals, but it reports no new clinical results.

This study found that the structural and chemical composition of human curly hair may resemble that of sheep wool, implying a shared characteristic among mammals with wavy hair.

This article reviews major types of genetic hair shaft defects and associated syndromes, emphasizing understanding histologic features and diagnostic methods, but reports no new clinical findings.

In this study, researchers reported that an herbal extract with dihydroquercetin glucoside, epigallocatechin gallate glucoside, zinc, and glycine showed similar effectiveness and safety to minoxidil in treating androgenetic alopecia over 24 weeks, with no significant differences in hair growth outcomes between the groups.

Atomic Force Microscopy is a more accurate way to assess hair damage and the effect of cosmetic treatments.

This study observed that lipids in human hair accumulate in specific areas and do not significantly impact water permeability, highlighting the utility of AFMIR for studying complex biomaterials.

The study improved understanding of keratin fiber structure by showing consistent microfibril diameter but varying distances and electron density profiles.

This study found that in naturally curved human scalp hairs, distinct arrangements of cell types on either side of the hair fiber contribute to its curvature.

This study observed that human hair macrofibrils predominantly exhibit a double-twist architecture with varying inter-macrofibril angles, advancing insights into their structural organization and mechanical implications.

This study found that melanin granules in black human hair are key dyeing regions for oxidative hair coloring, as confirmed by nanoscale mass spectrometry analysis detecting deuterium ions.

This study observed that hair fibers in older women become more curved with age, decreasing hair luster due to their disordered alignment and structural differences between the convex and concave sides.

This review highlights that hair's chemical bonds, particularly disulfide bonds, are not homogeneous, as previously thought, but instead vary in response to different cosmetic treatments, suggesting a need for further exploration of ionic bonds and hydrophobic interactions.

In this study, a bleaching protocol was developed to evaluate hair repair products, revealing that K18® and Olaplex® improve hair brightness and lightness, with distinct impacts on hair fiber properties.

This review examines the chemical composition and potential health risks of hair straighteners, but it reports no new findings and emphasizes the importance of understanding hair fibre structure for safe use.

This study found that rhodamine B penetrated human hair fibers more effectively from an aqueous solution compared to a methanol/ethanol solvent, with penetration depending on hair morphology.

This case report describes an eight-year-old Kashmiri boy diagnosed with monilethrix, a rare genetic hair disorder, characterized by a beaded appearance and fragility of the hair shaft.

This study found that hydrolyzed wheat proteins extensively penetrated both untreated and chemically treated hair, primarily occupying areas like the endocuticle and cortex.

This study suggests that holes found in mature hair fibers may be linked to daily hair care actions and the removal of extractable substances.