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Hair diameter diversity helps assess hair loss, but its standard measure varies by individual and ethnicity.

This study concluded that including ovarian morphology in the diagnosis significantly increases the estimated prevalence of PCOS, revealing substantial variability due to clinical criteria and diagnostic cut-offs.

This study observed that hair cortisol concentrations in primates are influenced by factors such as age, sex, hair growth rates, and sampling methods, which must be accounted for in research designs.

This study found that the moisture content of human hair significantly influences the type of fracture under tensile loading, with low or high humidity levels leading to smooth fractures and intermediate humidity resulting in step fractures.

In this study on Chinese Tan sheep, researchers discovered a variant of the KRTAP19-5 gene associated with decreased curvature of fine wool fibres, highlighting potential genetic markers for improving wool quality.

In this study, a method using riboflavin phosphate, citric acid, and polyols successfully optimized protein cross-linking in hair of all colors through visible light-mediated photo-cross-linking, improving the mechanical properties and hair-setting effects without the influence of hair color.

This study observed that the biophysical properties of hair in Caucasian females with brown hair significantly change with age, and smoking or being overweight was linked to smaller hair cross-sectional areas.

This article reviews the role of enzymatic processes in drug and toxin metabolism, emphasizing their impact on solubility and elimination, without presenting new clinical findings.

In this study, nucleotide sequence variation in the KRTAP13-3 gene was associated with changes in heterotypic hair fibre diameter variation in Chinese Tan sheep.

This study found that gender-affirming hormone therapy in transgender men increased acne and male pattern hair loss, while in transgender women, it led to melasma and female pattern hair loss.

This study observed defects in hair cuticle cross-linking in some, but not all, mouse mutants with sparse or structurally unsound hair.

This study observed that hair properties vary by ethnicity, influenced by genetic, environmental, and cultural factors, and noted that ethnicity-dependent differences in surface charge and other properties warrant further investigation.

Dermoscopy shows that varying hair shaft thickness and single hair follicles are main signs of male pattern baldness, especially in the fronto-temporal region.

This study found that root hairs in maize, wheat, and finger millet continued to grow beyond the typical root hair zone when grown with the Turface® fertigation system, highlighting potential for understanding root hair dynamics and crop improvement.

This study evaluated the Spanish version of the Hair Specific Skindex-29 questionnaire and found it sensitive to changes in health-related quality of life among women with female-pattern hair loss.

This review discusses the use of hair analysis for examining stress and reproduction hormone levels in wildlife and highlights the need for more comprehensive physiological validations across species.

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 the Cutaneous Lupus Disease Area and Severity Index (CLASI) is correlated with both physician-assessed and patient-reported outcomes in cutaneous lupus erythematosus, particularly highlighting concerns about body image in visible areas.

In this study, researchers developed a pH-sensitive dendritic polyglycerol nanogel to measure pH inside hair follicles using an ex vivo porcine ear model, finding that the pH increases from 6.5 at the skin surface to 7.4 in deeper follicle areas, without observed toxicity.

This study found that LC-MS/MS assays provided more reliable and precise steroid measurements in human serum compared to traditional immunoassays, particularly at lower concentrations.

This study observed that COVID-19-related stress and fear were potentially associated with an increased occurrence of hair diseases like telogen effluvium, alopecia areata, and seborrheic dermatitis among medical students in Bangladesh.

People with alopecia who are more resilient tend to feel less stressed.

The researchers reported that certain physical characteristics of hair shafts, such as length and color, may influence mtDNA read counts and degradation state when analyzed by massively parallel sequencing.

In this narrative review, the authors highlighted that AI-supported electronic health record analysis could help recognize Polycystic Ovary Syndrome/Polyendocrine Metabolic Ovarian Syndrome earlier, but also warned that these systems might perpetuate historical biases if not properly validated and interpreted.

A new tool helps better assess and treat hair loss in Chinese men.

This study found that novel thiol-reactive cross-linking agents, particularly APA, significantly improved the tensile strength and elasticity of human hair fibers by effectively regenerating disulfide bridges, with potential applications for advanced hair repair treatments in the cosmetic industry.

This cross-sectional survey found that individuals with alopecia areata and androgenetic alopecia perceived stigmatization and impaired quality of life, with greater stigma reported in German-speaking participants; factors like gender, age, and disease severity influenced stigmatization levels.

This review highlights the lack of research on Afro-textured hair, emphasizing the need for better understanding of its genetic traits and molecular structure to develop more effective hair care solutions.

This study found that scalp melanoma often occurs in areas with androgenetic alopecia, and patients without alopecia might experience a later diagnosis due to hair coverage, leading to potentially worse outcomes.

This study reports that injecting a non-cross-linked hyaluronic acid compound into keratosis pilaris-affected skin led to significant improvements in roughness, redness, and overall skin condition, while maintaining a favorable safety profile, making it a promising alternative treatment option.