September 2017 in “Journal of Investigative Dermatology” LRIG1 protein affects hair growth by regulating skin receptors, leading to hair loss when overexpressed.
Light tickling can be unpleasant and may feel worse for individuals with autism.
17 citations
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October 1981 in “American Journal of Clinical Nutrition” Malnourished people have weaker hair that is easier to pluck.
245 citations
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January 1998 in “Genes & Development” Hoxc13 gene is essential for hair, nail, and papilla development.
99 citations
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July 2012 in “PLoS Genetics” A mutation in the KRT75 gene causes frizzle feathers in chickens.
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December 2017 in “Journal of zoo and wildlife medicine” Hormonal changes during the reproductive cycle may cause seasonal skin problems in captive female fossas.
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June 2013 in “Journal of Dermatological Case Reports” Olmsted syndrome is a rare skin disorder causing thickened skin and other symptoms.
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December 1999 in “British Journal of Plastic Surgery”
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January 2019 in “International journal of biological sciences” Exosomes from dermal papilla cells help hair growth by making hair follicle stem cells multiply and change.
January 2005 in “Seibutsu Butsuri/Seibutsu butsuri” Chemical treatments damage hair more than UV exposure, making it thinner and less flexible.
5 citations
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March 2017 in “Gene” CAP1 decreases the expression of a hair-related protein in young Tan sheep's skin.
8 citations
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February 2017 in “International journal of molecular sciences” Mollusc egg extract helps skin and hair cells grow and heal.
June 2023 in “British journal of dermatology/British journal of dermatology, Supplement” Tight hairstyles can cause a rare scalp condition with thick skin folds.
1 citations
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January 2008 in “Genes & Genomics” 34 citations
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December 1984 in “Journal of Cutaneous Pathology” Monilethrix hair issues are due to problems in the hair's internodes.
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June 1993 in “Archives of Dermatological Research” Human hair follicles can be used to create skin-like tissue for wound healing and drug testing.
20 citations
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July 2010 in “Skin Research and Technology” Aging makes hair thinner and rougher, with less clear edges.
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.
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.
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January 1971 in “The American midland naturalist” A simple method can show hair's surface pattern.
2 citations
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December 1973 in “Calcified tissue research” Epilation and DHT cause skin calcification by increasing ATP and calcium deposits.
8 citations
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June 2021 in “Acta dermato-venereologica” Trichoscopy is a reliable method for diagnosing hair-pulling disorder.
59 citations
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November 2011 in “Development” Trps1 is essential for proper hair follicle development.
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January 2013 in “Indian dermatology online journal” The document reports a unique case of woolly hair with a combination of conditions not previously seen together.
40 citations
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February 1946 in “Canadian Journal of Research/Canadian journal of research” Hereditary factors cause hair loss in mice by affecting skin and hair follicle structure.
124 citations
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December 1988 in “Differentiation” Trichocytic differentiation starts in cells with epithelial cytokeratins, transitioning to trichocytic cytokeratins in hair and gradually in nails.
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January 1990 6 citations
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January 1994 in “Skin Pharmacology and Physiology” Dermal papillae are crucial for hair growth and follicle development.
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April 2010 in “Developmental Biology” Sebaceous glands can form new hair follicles when activated, but hair follicle bulges cannot.