December 2019 in “C&EN Global Enterprise” Thicker hair isn't always stronger.
5 citations
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November 2012 in “Journal of the American Academy of Dermatology” A 3-year-old girl has short anagen syndrome, causing her hair to stay short.
12 citations
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February 2011 in “Zenodo (CERN European Organization for Nuclear Research)” Hair properties vary with age and ethnic origin.
4 citations
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January 1981 in “PubMed” Hair medullary cells in mammals vary in complexity, with humans having more structured cells similar to inner root sheath cells.
January 2000 in “The Mouseion at the JAXlibrary (Jackson Laboratory)” The lanceolate hair-J mutation in mice helps understand human hair disorders like Netherton's syndrome.
January 2016 in “Case reports in clinical medicine” A 6-year-old girl was diagnosed with a rare hair disorder called monilethrix.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” Natural hair is a return to its original state, while modifications signal social pressures.
6 citations
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May 2003 in “PubMed” Small amounts of DNA can be found in the hair shaft, especially near the root, but it decreases with hair treatments and washing.
13 citations
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January 2002 in “Biological chemistry” Different conditions affect how hair proteins assemble, and certain mutations can change their structure.
1 citations
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March 2023 in “Anais Brasileiros de Dermatologia” 46 citations
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June 2013 in “Journal of structural biology” High glycine–tyrosine keratin-associated proteins help make hair strong and maintain its shape.
19 citations
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May 2008 in “Applied spectroscopy” Human hair has different protein structures in its cuticle and cortex.
119 citations
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November 2016 in “American journal of human genetics” Mutations in three genes cause Uncombable Hair Syndrome, leading to frizzy hair that can't be combed flat.
1 citations
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March 2005 in “International Journal of Cosmetic Science” Twisting hair weakens it, but strength can be recovered at low twist levels.
42 citations
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September 1985 in “British Journal of Dermatology” Trichothiodystrophy causes abnormal protein deposits and distortion in hair follicles.
23 citations
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July 1994 in “Journal of Dermatological Science” Pili torti hair twists due to uneven outer root sheath cell development.
March 2010 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Beard hair medulla cells have a unique and varied keratin pattern.
2 citations
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May 2012 in “Acta pharmaceutica sinica B” The study found unique microscopic features for hair or feather in five animal ingredients in Shenrongbian pill.
8 citations
,
April 2017 in “Journal of The Royal Society Interface” Giant axonal neuropathy changes the structure of keratin in human hair.
11 citations
,
January 1989 Two patients had a unique form of trichothiodystrophy with reduced high-sulfur proteins in their hair.
25 citations
,
January 1988 in “Journal of Investigative Dermatology” 3 citations
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July 2019 in “Fibers And Polymers/Fibers and polymers” 26 citations
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January 1983 in “PubMed” Trichothiodystrophy involves brittle hair due to low sulfur amino acids, not a transport defect.
1 citations
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November 2022 in “DOAJ (DOAJ: Directory of Open Access Journals)” Male and female human hairs have different microscopic structures that can help in forensic analysis.
January 2012 in “International Journal of Trichology” Two siblings have a rare genetic condition causing curly, coarse hair.
January 2000 in “Zhongguo yixue wulixue zazhi” Different human hair keratin types have unique structures that affect how they dissolve and can be used to create self-tendons.
6 citations
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January 2008 in “Indian Journal of Dermatology” Monilethrix, a genetic hair disorder causing fragile hair, affects three generations in a family.
7 citations
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June 2018 in “Journal of the American Academy of Dermatology” The document suggests finding a simpler, cheaper way to diagnose Uncombable Hair Syndrome.
January 2026 in “Clinical Case Reports” A 6-year-old girl had both monilethrix and trichorrhexis nodosa, causing brittle hair, with minimal improvement from treatment.
2 citations
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July 2016 in “Journal of nature and science” Human hair can transmit magnetic signals through glass.