271 citations
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March 1999 in “Developmental biology” The research shows that a gene called Wnt3 affects hair growth and structure, causing short hair and balding when overactive.
January 2023 in “Indian Dermatology Online Journal” Uncombable hair syndrome is linked to Zellweger syndrome.
25 citations
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October 1996 in “Dermatologic Clinics” Loose Anagen Syndrome causes easy-to-pull, thin hair, mainly in young girls, and improves with age.
141 citations
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June 2002 in “Philosophical Transactions of the Royal Society B Biological Sciences” The study revealed how specific genes and proteins control root hair growth in plants.
Curly wool has more orthocortex than straight wool.
9 citations
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April 2019 in “Journal of structural biology” Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.
33 citations
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August 2013 in “British Journal of Dermatology” Lack of small, fine hair on the front hairline is a key sign of frontal fibrosing alopecia.
1 citations
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August 1984 in “Therapeutische Umschau. Revue thérapeutique” Permanent hair removal with lasers is the most promising treatment for excessive hair growth.
Hydrophobic modifications make human hair less affected by water.
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.
3 citations
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January 2025 in “动物学研究” The gene GJA1 is important for regulating coarse hair density in goats.
8 citations
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September 2016 in “Journal of the American Academy of Dermatology” It's important to tell the difference between hair casts, pseudocasts, and nits.
April 2019 in “Progress in Crystal Growth and Characterization of Materials” Hair grows like a crystal at a solid-liquid interface without cell division.
September 2022 in “F1000Research” Removing hair from mice without reproductive glands led to grey hair, possibly helping to understand greying in aging.
4 citations
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June 2021 in “Scientific Reports” Hair fiber shape and curvature are not significantly linked when ancestry is considered.
July 2009 in “International Journal of Cosmetic Science” Japanese women's curved hair has an uneven internal structure and varied amino acid composition.
34 citations
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August 1966 in “Experimental cell research” Keratin fibrils in hair form and stop growing at specific points in the follicle.
2 citations
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May 2022 in “Stem cell research & therapy” Disrupted stem cell signals in hairpoor mice cause hair loss.
January 1961 in “The Journal of Anthropological Society of Nippon” Hair form in mixed-blood families varies due to hereditary twist-knots and pigment formation.
8 citations
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March 2007 in “The journal of investigative dermatology/Journal of investigative dermatology” The near-naked hairless mutation causes hair loss but is not due to a mutation in the hairless gene itself.
October 2021 in “Research Square (Research Square)” Hair follicle stem cells in hairpoor mice are disrupted, causing hair loss.
6 citations
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December 1966 in “Textile Research Journal” Animal hair fibers like wool and mohair are strong when dry, but vicuna fibers are very brittle.
September 2016 in “Journal of Dermatological Science” A gene mutation worsens skin irritation in mice due to a lack of certain fats.
September 2024 in “Journal of Investigative Dermatology” A new tool can analyze hair to detect changes due to hormones, genetics, and aging.
2 citations
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March 1942 in “JAMA”
A genetic variant in the KRT71 gene may cause loose anagen hair and wooly hair, and symptoms might improve with age.
9 citations
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January 1998 in “Studia Anglica Posnaniensia: international review of English Studies” Wound-induced hair growth may help study regeneration and aging, but it's unclear if this ability decreases with age.
39 citations
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July 2005 in “Current medical research and opinion” Topical cream eflornithine 11.5% can slow hair growth and may help reduce hair removal frequency.
10 citations
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June 2024 in “Frontiers in Genetics” Different sheep breeds share similar genetic factors affecting wool fineness.
63 citations
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October 2011 in “Archives of Dermatology” Isolated long hairs at the original hairline can help diagnose Frontal Fibrosing Alopecia.