65 citations
,
May 2001 in “Journal of Analytical Toxicology” This study found that amphetamine was preferentially incorporated into black hair compared to white hair in Long-Evans rats, suggesting a role for drug basicity in hair color-based drug incorporation.
23 citations
,
August 2017 in “Scientific Reports” Darker hair may lead to higher cortisol readings, suggesting a need to adjust for hair color in studies.
2 citations
,
October 2023 in “Dermatology practical & conceptual” This systematic review evaluated 60 studies on trichoscopy in hair and scalp disorders, revealing gaps in accounting for variables like disease stage or hair texture, and underscoring a need for more comprehensive analyses to fully understand trichoscopic patterns.
14 citations
,
December 2020 in “Journal of The American Academy of Dermatology” This study observed a significant increase in telogen effluvium cases among people of color during the COVID-19 pandemic in NYC, notably affecting Hispanic/Latinx individuals.
1 citations
,
August 2006 in “International forensic science and investigation series” Hair testing is a reliable method for detecting workplace drug use when done with proper sample preparation and confirmation.
114 citations
,
January 2007 in “Drug Safety” This review discusses various adverse drug reactions affecting the skin, hair, and nails, emphasizing the importance of recognizing and reporting these reactions but reports no new clinical findings.
16 citations
,
August 2000 in “Il Farmaco” This study observed that tryptophan levels in human hair are higher in males than females, increase with age, and vary with hair color, being highest in grey and white hair.
11 citations
,
December 2016 in “Frontiers in Psychology” In this study, researchers used computer-generated models to demonstrate that subtle changes in hair diameter, density, and style significantly affect perceptions of age, health, and attractiveness.
94 citations
,
April 2018 in “Nature Genetics” This study identified more than 100 genetic loci associated with hair color variation in Europeans, explaining a significant portion of the trait's heritability and advancing understanding of hair pigmentation.
25 citations
,
August 2015 in “Journal of cosmetic dermatology” This study observed significant differences in hair care practices and biologic hair parameters between Caucasian and African American women, which may contribute to varying hair fragility and growth.
2 citations
,
June 2013 in “Lasers in surgery and medicine” In this study, the hot-wire hair removal device (no!no!) was found to be no more effective than shaving in reducing hair density, regrowth rate, or altering hair characteristics.
1 citations
,
January 2020 in “Research Square (Research Square)” This study found that inherited color dilution in Rex rabbit hair follicles is associated with DNA methylation changes, contributing to understanding the epigenetic regulation of rabbit pigmentation.
This review discusses forensic DNA phenotyping and its potential applications, particularly for human identification in Latin American populations, but notes challenges due to genetic diversity and reports no new results.
October 2025 in “Journal of Veterinary Diagnostic Investigation” This study found that in domestic cats, black hair contained significantly higher cortisol concentrations than white hair, whereas ginger hair showed no significant difference compared to white hair. Additionally, a positive correlation was reported between hair cortisol levels and behavioral issues mentioned by cat owners.
April 2025 in “Health Science Reports” In this case-control study, researchers observed that smoking and lighter hair color significantly increased the risk of developing androgenetic alopecia, with older individuals and women showing higher prevalence rates, while hair thickness and shape were not linked to increased alopecia risk.
28 citations
,
May 2017 in “Molecular ecology” This study observed that in wild snowshoe hares, gene expression patterns during seasonal coat color change show a consistent lag between gene expression and visible coat color changes.
1 citations
,
July 2025 in “International Journal of Dermatology” This study highlights that misdiagnosis of hair and scalp disorders is prevalent in patients with skin of color and emphasizes the role of thorough examination and biopsies in improving diagnostic accuracy.
June 2024 in “International journal of women’s dermatology” This study highlighted that dermatology residents in the U.S. felt comfortable handling common hair conditions like androgenetic alopecia but were less confident in dealing with hair care specific to patients with skin of color, pointing to gaps in training programs.
June 2023 in “Journal of Drugs in Dermatology” This study highlights the challenges in diagnosing alopecia in Black patients, emphasizing the importance of a comprehensive approach involving clinical examination, trichoscopy, and biopsy to improve diagnostic accuracy.
18 citations
,
January 2020 in “Ecology and evolution” This study analyzed gene expression changes during the autumn coat color change in mountain hares and found conserved gene regulation with snowshoe hares, highlighting its role in seasonal camouflage adaptation.
20 citations
,
September 2021 in “Nature communications” In this study, researchers identified a gene expression pre-pattern and implicated the Wnt inhibitor Dickkopf 4 in the formation of color patterns in domestic cat embryos.
7 citations
,
April 2011 in “Expert review of dermatology” This article reviews practical approaches for managing dermatologic conditions in patients with skin of color and reports no new clinical findings.
1 citations
,
June 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” This study found that β-catenin stabilization in specific mammary epithelial lineages leads to cellular changes and the formation of hyperplastic lesions, revealing its role in initiating mammary neoplastic development.
March 2026 in “JAAD reviews.”
March 2026 in “Preprints.org” In this study, plerixafor was found to enhance melanogenesis and promote repigmentation by engaging a β-arrestin–β-catenin–MITF signaling axis in melanocytes, and showed effectiveness in restoring depigmentation in a murine model without causing systemic toxicity.
5 citations
,
September 2016 in “Security science and technology” DNA can predict physical traits like eye and hair color accurately, especially in Europeans, but predicting other traits and in diverse populations needs more research.
2 citations
,
September 2016 in “Springer eBooks” This article discusses how the brain's neural circuits evaluate skin aging to judge social standing and suggests that people often attempt to deceive themselves and others about their true age.
1 citations
,
August 2025 in “Journal of Investigative Dermatology” Genetic studies on hair traits can improve understanding of health and disease.
June 2024 in “Molecules/Molecules online/Molecules annual” This study found that Platycladus orientalis flavonoids may reduce oxidative damage and slow melanin degradation in AGA-affected hair, improving its quality.
6 citations
,
June 2018 in “PLOS ONE” This study demonstrated that the Alopecia Areata Assessment Tool (ALTO) effectively identifies alopecia areata cases with high sensitivity and specificity in a dermatology clinic setting.