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This study reports new cellular features and complex interaction systems in fiber differentiation, indicating more intricate cellular organization than previously recognized, including features like mast cells and primary cilia.

This study found that the mechanical stiffening of the human hair follicle along the first millimeter is linked to changes in the keratin network architecture and composition during keratinization.

This study found that normal physiological cutaneous changes were the most common skin changes during pregnancy in Northeast India, while specific dermatoses were rare and not significantly influenced by ethnicity or geography.

This study found that trichothiodystrophic hair shows reduced and disoriented protein deposition in follicles, with both the cuticle and cortex affected, providing localized structural insights into keratin abnormalities.

This study found that keratin fibers like human hair undergo thermal and mechanical transitions that can help assess changes from cosmetic processes such as bleaching and perm-waving.

This study observed that aging leads to significant structural and biological changes in the scalp's hair follicle environment in women, which may affect hair growth.

In this study, researchers found that proteomic changes with age were significantly more pronounced in dermal papilla cells compared to dermal sheath and interfollicular dermal fibroblasts in the female scalp.

In this study, the novel ASAXA-μCT imaging method identified that the shrinkage of sweat glands with aging causes dermal defects, reducing skin elasticity and contributing to wrinkling and sagging.

In this descriptive study, elderly patients most commonly presented with skin wrinkling, xerosis, and eczematous conditions, highlighting the difficulty in distinguishing normal age-related from pathological skin changes.

This study highlights age and sex as key factors influencing scalp parameters, thereby affecting hair health and suggesting they should be considered in developing hair care strategies.

This study suggests that hormonal receptor activity in skin regions undergoing mechanical stretching may influence extracellular matrix metabolism and the formation of SD, with variations in receptor functionality throughout lesion development stages.

This study found that hair luster decreases with age in Japanese females, primarily due to an irregular increase in fiber curvature which affects hair alignment.

This study found that in mice, wool structure deteriorates as a malignant tumor develops, suggesting potential uses in cancer diagnostics.

This study reveals that somatosensory neurons in mouse skin exhibit structural plasticity during hair-follicle regeneration, which may temporarily impair the reliability of encoding gentle touch.

This study reported that X-ray microscopy provides more intact images of hair's internal structure compared to transmission electron microscopy, particularly for observing fine details like cuticle coarsening and cortex cracks.

This study observed unique ultrastructural changes in a 4-year-old girl with pili trianguli et canaliculi that may affect hair shaft surface characteristics due to inner root sheath alterations.

This study found that ponytails with small fractions of gray hair have significantly lower swing height and higher damping, affecting the dynamic movement and appearance compared to those with fewer gray hairs.

In this study, hair shafts from trichothiodystrophy patients with ERCC2 mutations revealed abnormal cuticle structures and protein imbalances compared to normal hair shafts.

This study analyzed the swelling behavior of human hair during permanent waving treatment, finding that both the microstructure and macrostructure of intermediate filaments swell simultaneously at the initial stage, and while partially destructed by reduction, they are considerably restored through oxidation.

In this study, researchers used atomic force microscopy to capture and analyze morphological changes in the surface of healthy hair, identifying features such as pitting and rod-shaped macro-fibrillar elements, which could inform future research on hair conditions and care.

The study observed that in women, the number of hair follicles with an internal root sheath decreases with age in the parietal region, also hinting at a reduction in hair follicle and shaft width.

This study found that ageing in women leads to significant structural and biological changes in the scalp hair follicle environment, which may affect hair growth.

This article reviews how environmental factors and aging contribute to skin and hair changes, including wrinkling, dryness, pigmentation changes, and hair thinning, but reports no new research findings.

This study found that G protein-coupled estrogen receptor enhances melanin synthesis in melanoma cells through cAMP-PKA-MITF-TYR signaling, suggesting its potential as a drug target for chloasma treatment.

This study conducted in situ tensile loading experiments with atomic force microscopy to observe how conditioning treatments affect the tensile response of virgin, chemically damaged, and mechanically damaged Caucasian hair.

This study found that careful light microscopy using fluid-mounted hair improves detection of the pili annulati phenotype, which varies widely in expression and affects hair fragility.

In this study, permanent waving treatments, especially those using lotion B and repeated procedures, were found to significantly damage hair protein content and physical properties.

This study investigated the effects of wool-derived hydrolysed keratin peptides on relaxed textured hair and found that mid- and high-molecular weight peptides improved mechanical strength and reduced breakage in different humidity conditions.

This study used infrared spectroscopic imaging and scanning electron microscopy to reveal that alopecic hair has more irregular laminated structures and differing chemical profiles than normal hair, suggesting changes related to alopecia progression.