July 2025 in “Journal of Investigative Dermatology” Secreted inhibitors of Wnt and IGF signaling control hair and tooth development, creating species-specific patterns.
May 2024 in “JCI insight” A variant in the ADAM17 gene causes hair loss by increasing protein degradation through TRIM47.
January 2026 in “Indian Journal of Dermatopathology and Diagnostic Dermatology” Corkscrew hairs can help diagnose trichotillomania.
17 citations
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June 2012 in “Journal of experimental zoology. Part B, Molecular and developmental evolution” Hair in mammals likely evolved from glandular structures, not scales.
January 2020 in “International journal of scientific research” Dermoscopy shows that varying hair shaft thickness and single hair follicles are main signs of male pattern baldness, especially in the fronto-temporal region.
Frontal hair in male pattern baldness shows reduced growth and thickness.
January 2002 in “Medical archives (Sarajevo, Bosnia and Herzegovina)” Herbal extract may help treat certain types of hair loss.
21 citations
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July 2014 in “British Journal of Dermatology” Hair thickness matters more than density for baldness in Japanese men over 25.
January 2021 in “International journal of dermatology, venereology and leprosy sciences” Trichoscopy shows black dots, yellow dots, and empty follicles are common in Alopecia Areata, with broken and exclamation mark hair as typical patterns.
November 2017 in “British Journal of Dermatology” Genes controlling hair growth and immune response are disrupted in male pattern baldness.
7 citations
,
December 2015 in “International Journal of Dermatology” New and known mutations in the hairless gene cause a hair loss condition called Atrichia with papular lesions.
16 citations
,
January 2015 in “Annals of Dermatology” The study found specific hair and scalp patterns for different types of hair loss in Koreans, noting racial differences affect diagnosis.
2 citations
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January 2017 Hair movement can indicate hair quality and health.
January 2014 in “Journal of the Korean Society of Design Culture” The study confirmed that changes in hair structure in women with hair loss conditions matched what is taught in beauty college trichology courses.
36 citations
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December 2016 in “Journal of The American Academy of Dermatology” The normal range for the hair pull test is 2 hairs or fewer, and washing or brushing hair before the test does not affect the results.
21 citations
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January 2020 in “Conservation Physiology” Hair follicles increase hair cortisol levels, so consistent hair collection methods are important.
8 citations
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December 2022 in “BMC Genomics” The research improved understanding of yak hair growth to help use yak wool better.
7 citations
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December 1987 in “Fertility and sterility” The vellus index is a simple, quick, and reliable method to assess and monitor hair growth, especially in hirsutism.
November 2025 in “Pediatric Dermatology” The boy's hair fully regrew after treatment for a rare hair loss condition.
March 2024 in “Journal of clinical medicine” Trichoscopy shows hair diameter variability, vellus hairs, and the peripilar sign are key indicators for diagnosing Androgenetic Alopecia.
11 citations
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August 2012 in “Canadian journal of ophthalmology” Eyelash alopecia areata often goes undiagnosed and can lead to complete eyelash regrowth, especially in younger patients.
9 citations
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August 2018 in “Journal der Deutschen Dermatologischen Gesellschaft” Most patients with frontal fibrosing alopecia are middle-aged women, often have thyroid disease, and some treatments can help stabilize the condition.
January 2007 in “Pizhūhish va sāzandigī” Hairless guinea pigs are useful for research in allergies, skin tests, and diseases.
1 citations
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December 2023 in “Animals” Winter provides the best fur quality for Rex rabbits due to seasonal changes in specific signaling pathways.
10 citations
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January 1971 in “The American midland naturalist” A simple method can show hair's surface pattern.
114 citations
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May 2001 in “Development” Overexpression of Hoxc13 in hair cells causes hair loss and skin issues.
January 2024 in “Revista Dermatológica Centro Uraga” Frontal fibrosing alopecia is increasingly affecting men, causing hair loss around the hairline and possibly other areas.
12 citations
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December 2016 in “PubMed” Hirsutism involves excessive hair growth due to hormonal issues and can be treated with medication or surgery.