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This study suggests hair diameter may indicate protein status in children if the sampling location on the head is controlled, noting inconsistencies in past research.

FPHL affects hair density and diameter, causing visible hair loss in older women.

Women with thinning hair have thinner hair strands than women without hair loss.

This study analyzed changes in hair diameter and density with age in Caucasian women, highlighting variations in perception of hair amount over time.

This study proposes a new clinical scoring method for hair density based on hair diameter diversity, which correlates with existing measures and reflects follicle miniaturization in androgenetic alopecia.

This study found that in the Thai population, hair density varies by scalp location and decreases with age, and that Asians generally have lower hair density compared to Caucasian and African populations.

This study found significant differences in hair density, non-vellus hair diameter, and percentage of miniaturized hair between normal women and those with female pattern hair loss, particularly in the midscalp and parietal areas.

In this study, hair loss in Japanese men with androgenetic alopecia was found to be primarily due to hair follicle miniaturization rather than hair shedding, particularly in those aged 25 and older.

This study found that hair diameter varies significantly within the occipital safe donor area, with thicker hair in the upper sections and thinner hair in the lower sections.

This study found significant differences in hair diameter between males and females across different zones of the safe donor area, which may aid in selecting optimal donor regions for hair transplantation surgeries.

This study developed a high-resolution phototrichogram system that can automatically and accurately assess hair growth metrics in cosmetic trials, achieving over 90% correlation with manual measurements.

This study found that intradermal injections of platelet-rich plasma were equally safe and effective for treating androgenetic alopecia, with higher platelet numbers possibly enhancing hair density and follicle diameter.

This study reports that hair in women with systemic lupus erythematosus is thinner than in healthy women, but not significantly different from women with rheumatoid arthritis.

In this study, heritability analyses in twins and siblings revealed that genetic factors predominantly influence hair diameter and curvature, with notable sex differences in their genetic impact.

This study found that platelet-rich plasma injections increased hair diameter in the treated Pakistani population, with significant improvements observed in both men and women.

This study identified a new class of shed hair in young women that could impact future hair research and suggests that the concept of hair miniaturization in androgenetic alopecia may need revision.

In this study, researchers conducting a genome-wide association study on 263 adult female goats identified significant genomic variants linked to coarse hair diameter, particularly emphasizing a crucial region on Chromosome 10. These findings enhance understanding of the genetic factors influencing fiber diameter in goats.

In this study, the researchers found that a manual micrometer caliper is a reliable tool for planning hair transplant surgery and accurately measures the short axis of the hair shaft.

This study found that visual hair density is better correlated with hair count and shaft diameter, leading to the development of the Hair Diameter Index used in planning hair restoration procedures.

This study found that measuring hair thickness with a phototrichogram provided significantly thicker readings than using a micrometer caliper, suggesting that the phototrichogram may be more clinically useful for evaluating hair in patients undergoing hair transplantation.

In this study, a specific genetic variant of KRTAP6-2 in Longdong cashmere goats was associated with finer cashmere fiber diameter, suggesting its potential as a molecular marker for breeding improvements.

This study found that donor sites with higher hair density and thicker hair diameter had a better appearance after follicular unit excision in men with androgenic alopecia.

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.

In this study, Arab hair was found to have a higher thickness and lower density compared to other ethnicities, suggesting these factors should be considered in diagnosing and treating hair issues in Arabs.

This review proposes that inconsistent findings in androgenic alopecia research are due to variable biopsy location, hair diameter diversity, and hair follicle miniaturization, and suggests ways to improve study methods.

This study found that electrospinning membranes with smaller fiber diameters significantly improved skin wound healing by promoting cell proliferation and encouraging reparative macrophage transformation.

This study found that cast application for at least 4 weeks significantly increased hair length, diameter, and density on the casted leg compared to the non-casted leg.

This article provides an overview of hair density, hair diameter, and the prevalence of female pattern hair loss but reports no new clinical findings.

Hair diameter diversity could improve androgenetic alopecia assessment and treatment planning.

In Indonesian men with early androgenetic alopecia, this study found that hair iron levels were positively correlated with hair diameter, suggesting potential for improving hair thickness.