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This retrospective review of hair samples from pediatric patients indicated that microscopic hair examination might be a useful first-line investigation for diagnosing various genetic conditions.

The vellus index is a simple, quick, and reliable method to assess and monitor hair growth, especially in hirsutism.

This study developed and validated a simple, accurate, and sensitive HPTLC method for estimating minoxidil and aminexil in topical solutions, demonstrating effective separation and linear measurement of these compounds with %RSD under 2% and high regression coefficients.

This review outlines the transition from simple hair follicle organoids to immune-competent microphysiological systems, addressing limitations in replicating native hair follicle immune features and discussing their applications in disease modeling and regenerative medicine.

This study developed and validated a simple, cost-effective UV–Visible spectrophotometric method for estimating finasteride in pharmaceuticals, demonstrating good linearity, accuracy, precision, and sensitivity according to ICH guidelines, making it suitable for routine quality control.

This study developed and validated a simple, precise, and cost-effective UV spectrophotometric method for quantifying Minoxidil in bulk and pharmaceutical forms, reporting high accuracy with recovery rates between 99.57% and 100.55%, and a correlation coefficient of 0.9993.

This study found that in a sample of girls and adolescents aged 15–24 years, the prevalence of PCOS was 22.5% according to the Rotterdam criteria.

This study developed and validated a simple and cost-effective spectrophotometric method to accurately determine Aminexil in cosmetic formulations containing niacinamide and pyridoxine.

This study found that single-crystal magnesium samples smaller than 100 nm exhibited increased plastic deformation due to greater activation of nonbasal planes as local flow stresses approached 2 GPa.

This study found that a simple surgical technique for eyebrow restoration using hair follicle transplantation yielded satisfactory results in all 18 cases.

Thoracic medial branch block may be a simpler and effective alternative to thoracic vertebroplasty for pain management.

This study developed a precise and simple HPLC method for estimating tamsulosin and finasteride simultaneously in pharmaceutical forms, demonstrating good precision and potential usefulness for combined dosage analysis.

This study reports that scalp biopsies in white adults usually have 16.5 hair follicles, primarily in the anagen phase, with male samples showing fewer follicular units but more fibrous tracts in certain areas.

This study found that among a diverse sample of US adults, individuals with skin of color had a higher prevalence of alopecia areata compared to Whites.

This study suggests that sebum samples can be effectively stored and transported with less stringent requirements than liquid samples, making them suitable for remote or at-home collection before clinical analysis.

This study found that most milk powder samples tested from the Romanian market contained element concentrations exceeding legal limits, especially potassium, calcium, chlorine, phosphorus, and aluminum.

This study found that blood samples from donors on teratogenic drugs sometimes exceeded recommended concentration limits, suggesting a need for improved deferral policies.

This study found that in a sample of female adolescents in Shiraz, the most common PCOS phenotype was hyperandrogenic with polycystic ovary syndrome, warranting further investigation due to associated risks.

This study found that hair samples effectively captured average estradiol levels over time in both humans and monkeys, using a validated double-extraction protocol.

This study found that analyzing hair samples in young children for drug exposure can indicate environmental drug exposure or in-utero exposure, but cannot definitively confirm deliberate drug administration.

This study found that collecting hair samples for cortisol analysis is feasible in community-dwelling individuals with longstanding multiple sclerosis, although no significant correlation between hair cortisol levels and perceived chronic stress was observed, highlighting the complexity of stress measurement in this population.

This study found that in a sample of 520 patients experiencing hair loss, 66.15% were infected with Demodex mites, with a significant correlation between mite density and severity of hair loss suggesting Demodex as a contributing factor.

In this study of a Colombian sample, the researchers found that while sex, alopecia location, and symptoms aligned with global reports, age at presentation, tobacco use, and use of wigs and dyes were different from those noted in other countries.

This research found that heavy metal concentrations of arsenic, lead, cadmium, and iron were significantly higher in human hair samples from 100 years ago compared to today's levels in southern Poland, with a median decrease of 69–95%.

This study found that in biopsied skin samples of alopecia areata, a lower anagen/telogen ratio was associated with increased T cell infiltration, and enhancing the PD-1/PD-L1 axis may inhibit CD8+T cell infiltration and improve the condition.

This study used in-lab hair samples to show that cut hairs found at a crime scene and on a suspect can be matched to confirm they were from the same individual.

This study reports that hair samples can be used to track chronic hormone levels, revealing stress, reproductive, and sodium regulation patterns in wildebeest related to environmental factors.

This study found that reduced hair samples showed higher protease degradation than permed hair, which increased with repetitive perming, and degradation was influenced by the type of mercaptan used.

This study developed a method for extracting proteins from micro-sized human head hairs, facilitating proteomic analysis even with limited hair sample availability.

This study suggests that using sebaceous glands from rat tail skin samples may effectively capture hair follicle stem cells, potentially aiding skin regenerative medicine when available tissue is limited.