A 5-year-old girl has sparse, dry, and brittle hair but is otherwise healthy.
July 2020 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature”
April 2025 in “Dermatology Practical & Conceptual” UV-enhanced trichoscopy helps diagnose hair shaft disorders like pili annulati.
2 citations
,
November 1996 in “PubMed” Most people have similar hair protein patterns, but a rare variant was found in two women.
236 citations
,
January 1951 in “Physiological zoology” Hair growth and pigmentation in mice involve specific stages crucial for research.
6 citations
,
January 2020 in “Postepy Dermatologii I Alergologii” Trichoscopy is useful for diagnosing hair-pulling disorder.
75 citations
,
September 1985 in “Archives of dermatology” Two boys had a rare skin condition needing to be differentiated from similar disorders, with unclear inheritance due to few cases.
1 citations
,
January 2023 in “Chemical Engineering Journal”
May 2025 in “Journal of Developmental Biology” Jawless vertebrates have teeth proteins similar to those in mammalian hair and nails.
35 citations
,
November 1931 in “Journal of Genetics” Hairless mice lack fur due to a genetic mutation affecting skin response, not hormone issues.
7 citations
,
April 2018 in “Cosmetics” Lipids in Japanese hair help maintain glossiness and structure.
2 citations
,
June 2016 in “Korean journal of veterinary research” Emodin may help hair grow similarly to minoxidil and could treat baldness.
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.
1 citations
,
March 1994 in “Proceedings of the British Society of Animal Production” Prolactin and melatonin affect the growth of Angora and Cashmere goat hair differently.
21 citations
,
March 2019 in “Experimental Dermatology” Immune cells around hair follicles help control hair growth and could be targets for treating hair disorders.
January 2004 in “Laboratory Animal Science and Administration” The hairless mutant gene causes early hair loss and affects skin and thymus development in mice.
13 citations
,
September 1997 in “Archives of Dermatology” The boy likely has a fungal infection causing hair loss.
30 citations
,
November 2005 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” The lipid in human hair follicles acts as a barrier, similar to the skin's lipid layer.
12 citations
,
February 2006 in “Lipids” Hair texture changes with age due to varying levels of lipids.
110 citations
,
January 1983 in “Brain Research Reviews” Monkey lips have dense sensory nerves similar to those in other skin areas, explaining their sensitivity.
March 2003 in “Clinics in Dermatology”
7 citations
,
January 2020 in “Scientific Reports” Rabbit skin analysis showed changes in hair growth and identified miRNAs that may regulate hair follicle development.
29 citations
,
June 2005 in “Journal of Zoo and Wildlife Medicine” Most hair loss in captive rhesus macaques is likely due to environmental and behavioral factors.
264 citations
,
October 1958 in “Archives of Dermatology” A 4-year-old girl has a rare hair condition causing fragile, short hair.
7 citations
,
December 2010 in “대한의생명과학회지” Hair growth after depilation increases skin thickness, mast cell counts, and cell activity.
13 citations
,
March 2020 in “Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy” Alopecic hair has more irregular structures and chemical changes than normal hair, reducing its strength.
July 2023 in “International journal of physiology” Hypertrichosis lanuginosa causes excessive fine hair growth, often linked to genetics or cancer, with limited treatment options.
5 citations
,
March 2022 in “STAR Protocols” The method helps study hair follicle stem cells and calcium signals in mouse skin.
6 citations
,
December 1966 in “Textile Research Journal” Animal hair fibers like wool and mohair are strong when dry, but vicuna fibers are very brittle.
6 citations
,
December 2018 in “International Journal of Cosmetic Science” Mexican women's hair is between Asian and Caucasian hair in thickness and shape, with varied strength and some damage.