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This study found that among the Idoma people of Benue State, Nigeria, approximately two-thirds have a curved (widow's peak) hairline, with this shape being predominant across both genders.

This study found trichoscopy to be a highly sensitive, non-invasive method for diagnosing tinea capitis in children, which could be valuable in resource-limited settings lacking mycological culture facilities.

This review discusses the limitations of current hair classification systems and highlights the need for standardized reporting of key hair characteristics to improve study comparisons; it reports no new results.

Different hair types from various ethnic groups affect hair shine due to characteristics like thickness and shape.

This study found that examining hair morphology provides deeper insights than classification, suggesting a potential population stratification artefact between hair curvature and cross-sectional shapes in the examined admixed African-European sample.

In this study, researchers found that the curliness of human hair is associated with an asymmetric structure at the cellular level, particularly in the differentiation of the precortex.

This study found that high-speed optical coherence tomography may be a promising non-invasive tool for analyzing human hair conditions.

This article describes the first documented case of acquired uncombable hair syndrome in a 39-year-old woman, contributing to the understanding of this rare condition.

This study found statistically significant patterns in hair morphology and ultrastructure linked to biogeographic ancestry among European, African, and East Asian populations.

In this study, researchers used three-dimensional reconstruction to show that the shape of the hair follicle determines the hair's form, with variations observed among different racial groups.

This study demonstrated that optical coherence tomography effectively detects significant changes in hair structure caused by steroid treatment, suggesting its potential use in doping control and clinical therapy monitoring.

This article examines microscopic structural differences and pigment distribution in various rabbit hair colors and reports no clinical results.

Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.

This article reviews uncombable hair syndrome, highlighting its symptoms, potential diagnosis methods, and the suggestion for biotin supplements, but it reports no new empirical results.

This study surveyed individuals seeking estrogen-based gender-affirming hormone therapy, revealing that improving life satisfaction and femininity are top treatment goals, and highlighting the need for trials aligned with community priorities.

In this study, hair samples from Mexican women were found to be intermediate in diameter and shape between Asian and Caucasian hair, exhibiting high intra- and inter-individual variability and unexpected levels of tensile damage.

This study examined hair classification based on geo-racial origin, observing that Caucasian and Mediterranean hair differs morphologically from African or Asian hair, with differences in density, thickness, and fiber shape contributing to varied hair characteristics such as color and curliness.

This study found that among Pakistani men with hair loss, the M type pattern was the most prevalent according to BASP classification.

This study found significant gender differences in total testosterone and dehydroepiandrosterone sulfate levels among noncritical COVID-19 patients, which were associated with severity markers in males.

This study found that negative illness perception in Saudi patients with alopecia is linked to reduced quality of life and increased anxiety and depression, highlighting the importance of addressing both physical and mental health in treatment.

This study found that 70-MHz ultrasound can detect early signs of hidradenitis suppurativa linked to severity, including hair follicle abnormalities and keratin fragmentation, aiding in diagnosis and management.

This study found that distinct spiny hair morphologies in rodents arose independently multiple times but did not link the Ecdysoplasin A receptor gene mutation that affects human hair to these variations.

In this study, oral biotin improved hair growth, strength, and combability in a child with uncombable hair syndrome, while hair in two others slowly improved without biotin.

This study found that mink pelts with "singe" and "red hip" defects often exhibit split hair tips and altered cuticle structures, which may contribute to their undesired metallic sheen.

Hair shaft changes may be linked to CCCA, but their role is unclear.

Hair shaft malformation contributes to Central Centrifugal Cicatricial Alopecia.

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.

This letter to the editor describes a case of acquired progressive kinking of the hair in a Korean female adolescent, but no new research findings are reported.

Uncombable hair syndrome causes dry, frizzy hair that can't be combed flat, seen in a young child.

This study developed a prototype device that suggests potential for diagnosing changes in hair quantity, diameter, and density, though formal clinical studies are needed to confirm these findings.