12 citations
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July 2016 in “British journal of dermatology/British journal of dermatology, Supplement” Different hair fiber development might explain why hair loss severity varies in patients with a specific genetic mutation, and treatments that thicken hair could help.
January 2009 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” Curved human hair has different structures on each side, which might cause its shape and is similar to wool.
5 citations
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May 2014 in “Clinical and Experimental Dermatology” Mutations in the desmoplakin gene can cause hair problems and deadly heart disease.
2 citations
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March 1977 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” Defective mink guard hairs have split tips and missing cuticle cells, causing a metallic sheen.
December 2021 in “Molecular genetics and genomics” Cats with abnormal hair had DSG4 gene changes causing hair problems.
38 citations
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September 1997 in “The journal of investigative dermatology/Journal of investigative dermatology” A mutation in mice causes hair loss and skin issues due to a defect in a gene affecting cell adhesion.
11 citations
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February 2011 in “The Journal of Dermatology” Mutations in the hairless gene cause a rare form of permanent hair loss.
42 citations
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September 2000 in “British Journal of Dermatology” Some children are born with unusually short, fine hair because their hair growth phase is short, but this often gets better by itself during puberty.
5 citations
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November 1979 in “PubMed” A hereditary condition causes hair loss and twisted hair in some family members.
1 citations
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October 2012 in “The Journal of Dermatology” A Korean girl developed kinky hair without known cause or effective treatment.
September 2024 in “Meditsinskiy sovet = Medical Council” As women age, hair follicles decrease in number and hair width tends to reduce.
2 citations
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May 1979 in “PubMed” Monilethrix is not caused by a metabolic defect.
65 citations
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May 2006 in “Journal of Structural Biology” Hair curliness is due to uneven distribution of different cortices within the hair fiber.
July 2011 in “Microscopy and microanalysis” Human hair's structure makes it tough and resistant to breaking.
37 citations
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August 1999 in “Journal of Investigative Dermatology” A specific gene mutation causes complete hair loss without other health issues.
69 citations
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April 2005 in “Forensic Science International” Degraded hair shafts resist contamination and can be easily cleaned.
1 citations
,
July 2024 in “International Journal of Dermatology Venereology and Leprosy Sciences” Cysteine strengthens hair, and glutamine fuels hair growth.
Trichorrhexis nodosa causes hair to break easily, often affecting young to middle-aged black women.
83 citations
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October 1998 in “The American Journal of Human Genetics” A specific gene mutation causes complete hair loss in an Irish Traveller family.
January 2012 in “International Journal of Trichology” Two siblings have a rare genetic condition causing curly, coarse hair.
4 citations
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January 1991 in “Dermatology” Hair casts are small structures on hair shafts with unknown causes.
15 citations
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March 1996 in “PubMed” Anorexia nervosa may cause a hair defect called pili torti due to malnutrition and high vitamin A levels.
September 2016 in “Journal of The American Academy of Dermatology” The girl has a genetic hair condition causing thin hair since childhood.
September 2016 in “Journal of dermatological science” The conclusion is that the variation in hair thinness in patients is mostly due to the amount of underdeveloped hairs, and treatments that thicken fine hairs might work for those with mild to severe conditions.
10 citations
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November 1997 in “British Journal of Dermatology” A 10-year-old boy had the earliest reported case of hair that became progressively kinkier but eventually returned to normal on its own.
34 citations
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October 1982 in “Journal of applied polymer science” Moisture content significantly affects how human hair breaks.
1 citations
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December 2024 in “Methods in molecular biology” Hair proteins are complex and provide valuable genetic and biological information.
A 5-year-old girl has sparse, dry, and brittle hair but is otherwise healthy.
86 citations
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June 1998 in “Journal of Investigative Dermatology” The hairless gene mutation causes baldness by disrupting hair follicle structure.
2 citations
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June 1980 in “International Journal of Dermatology” Scalp biopsies are important for diagnosing hair loss conditions.