July 2016 in “Indian journal of science and technology” Neonate scalp hair is thinner, lacks a medulla, and has smaller follicles compared to adult hair.
May 2024 in “Frontiers in medicine” A genetic mutation in the LIPH gene causes tightly curled hair that stops growing in some Japanese individuals.
24 citations
,
December 1957 in “Experimental Cell Research” The glassy layer of hair follicles has different fibril sizes and arrangements in guinea pigs and young mice.
March 2024 in “Clinical Case Reports” Early detection of tinea capitis is possible by spotting specific hair patterns like comma or corkscrew hairs.
5 citations
,
February 1998 in “Polymer” Human hair keratin has a 40% α-helix structure that changes to a random coil in 8 M urea.
2 citations
,
January 2014 in “Dermatology Online Journal” Hair-thread tourniquet syndrome needs more awareness and discussion in dermatology.
7 citations
,
January 2012 in “International journal of trichology” Permanent hair removal with lasers may cure itchy black hair bristles on the back.
38 citations
,
November 2005 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” Understanding normal hair follicle development helps analyze abnormalities in mutant mice.
23 citations
,
January 1981 Hair is mostly made of three protein types: helical, high-sulfur, and high-tyrosine.
13 citations
,
January 2002 in “Clinics in dermatology” A mushroom extract might reduce hair loss and liver damage caused by certain chemotherapy drugs in animals.
January 2006 in “Dianzi xianwei xuebao” Netherton syndrome causes specific skin and hair changes that help in early diagnosis.
June 2018 in “British Journal of Dermatology” Hair cells lose their nucleus and mitochondria in a specific order as they fill with keratin, which could help develop treatments for hair issues.
6 citations
,
January 2000 in “Dermatology” A girl's severely tangled hair couldn't be fixed and had to be cut due to a rare condition called plica neuropathica.
11 citations
,
January 1997 in “Journal of Dermatological Science” A new protein linked to hair strength was identified, aiding in understanding brittle hair conditions.
February 1999 in “The anatomical record” Two mouse mutants have defective hair cuticle cross-linking.
32 citations
,
January 2000 in “Human Heredity” Monilethrix severity varies and may be influenced by other genetic or environmental factors.
April 2019 in “Progress in Crystal Growth and Characterization of Materials” Hair grows like a crystal at a solid-liquid interface without cell division.
April 1996 in “Journal of Dermatological Science”
3 citations
,
June 2020 in “Developmental Cell” Feather patterns are influenced by enhancers and chromatin looping, and the structure of protein complexes important for hair growth has been detailed.
21 citations
,
December 2015 in “European journal of cell biology” Tight junctions create a barrier in pig hair follicles that controls what can enter the skin.
April 2017 in “Journal of Investigative Dermatology” Scientists created a tiny, 3D model of a hair follicle that grows and acts like a real one.
6 citations
,
October 1988 in “Clinics in Dermatology” The molecular details of hair growth are not well understood.
10 citations
,
January 1971 in “The American midland naturalist” A simple method can show hair's surface pattern.
72 citations
,
July 1984 in “Journal of Investigative Dermatology”
September 2025 in “International Journal of Ayurvedic Medicine” Hair medulla patterns vary by Prakruti type, affecting hair strength.
1 citations
,
April 2019 in “PubMed” The medulla in Asian scalp hair has a tubular structure that allows ions and large molecules to flow through it.
June 2021 in “International journal of research in dermatology” Shaving and avoiding brushing improved the patient's beard hair condition.
1 citations
,
January 2009 in “Journal of S C C J” Changing disulfide bonds in human hair affects its melting behavior and thermal stability.
17 citations
,
November 2012 in “Journal of Investigative Dermatology” The document concludes that over 500 genes are linked to hair disorders and this knowledge is important for creating new treatments.
April 2020 in “International Journal of Cosmetic Science” The study found that minor protein differences between curved and straight Japanese hair are unlikely to significantly affect hair structure.