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This paper presents a culturally informed protocol designed to improve the collection of hair samples from African Americans for cortisol measurement, illustrating its application with community-based study data.

This study observed that bacterial communities on scalp hair collected through non-invasive swabbing showed similar diversity and composition to those obtained by cutting or removing hair, suggesting that swabbing is an effective method for microbiome analysis on hair.

This study suggests that collecting hair samples from all scalp regions may be a viable alternative for measuring cortisol in individuals with Afro-textured or extremely short hair, aligning results with traditional methods.

Self-collected hair samples can measure stress but may need adjustments for accuracy.

This study details a step-by-step protocol for preparing mammalian skin samples, including hair follicles, for spatial transcriptomics to overcome challenges inherent in applying this technique to the skin.

This review highlights the importance of standardizing pre-analytical procedures for collecting and extracting samples from uncommon biological specimens like breast milk and sweat in clinical metabolomics, to enhance diagnostic and biomarker discovery efforts while minimizing contamination and bias.

This review highlights that human hair is a valuable biological matrix for clinical and toxicological analyses, demonstrating its applicability in detecting various active substances from different pharmacological classes.

This study found that clippers are the safest and most efficient tool for collecting hair samples from companion dogs, with no impact on cortisol concentration compared to scissors.

This study found that glycated proteins in untreated scalp hair may serve as a non-invasive marker for blood glucose control, but its applicability is limited by factors like cosmetic treatments and sample collection challenges.

This study found that among young adults, willingness to provide hair and fingernail samples for cortisol measurement was similar, with discomfort around sampling as the main barrier; informational videos did not significantly alter participant willingness.

Hair testing is a reliable method for detecting workplace drug use when done with proper sample preparation and confirmation.

Hair chromium levels reflect nutritional status after standard washing.

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 people with chronic telogen effluvium had lower hair and serum iron levels and higher serum copper levels compared to healthy controls.

This review discusses the use of umbilical cord blood in regenerative medicine, focusing on collection, banking processes, and ethical considerations, without presenting new clinical results.

This review highlights how forensic drug analysis in hair using modern instrumental techniques offers advantages such as easy sample collection and chronological tracking of drug use, emphasizing its value for law enforcement and other applications.

This article discusses various diagnostic techniques for investigating equine skin diseases and reports no new clinical results.

This study found that measuring reproductive hormone levels in brown bear hair may effectively support non-invasive genetic sampling, though larger samples or more sensitive techniques are needed for broader application.

This study found that cortisol concentrations were significantly higher in hair samples with follicles compared to those without, suggesting potential confounding in stress assessments using different hair sampling methods.

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 light and sucrose have opposing effects on root length but collectively enhance root hair emergence and elongation in plant roots.

This study found that nasal swab DNA collection was more convenient and yielded higher quality and quantity DNA samples than blood collection in both Angus cattle and yaks.

This study developed a novel system that can automatically estimate hair loss parameters from images without expert input, reporting satisfactory results from testing on samples collected in Kolkata.

This review discusses the increasing importance of hair analysis in forensic toxicology and highlights the complexities in interpreting results due to external contamination and regional collection differences, but reports no new findings.

This study demonstrated that stress inhibited hair growth in mice, likely through substance P-dependent activation of immune cells, highlighting a brain-hair follicle connection.

This study explored how men's perceived height and androgenetic alopecia affect social and personality impressions, reporting a potential "attractiveness malus" but noting limitations due to an older dataset, selective sample, and cultural homogeneity among raters.

In this study, researchers found that impaired cholesterol biosynthesis in hair follicles may trigger an inflammatory immune response linked to primary cicatricial alopecia, providing new insights into the disorder's pathogenesis.

This study found that dengue virus infection caused inflammation and cell death in human hair-follicle dermal papilla cells, which may contribute to increased hair shedding observed during the epidemic in Taiwan.

This study suggests that IGFBP-2 may play a role in basal cell carcinoma development by mediating epidermal progenitor cell expansion in hair follicles with activated Shh signaling.

This study found that some white or grey human hairs can naturally regain pigmentation, suggesting a potential temporary reversibility of hair greying associated with stress and molecular changes.