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.
January 2008 in “대한미용학회지” UV exposure severely damages hair, making it rough and weak.
January 1991 in “Journal of Society of Cosmetic Chemists of Japan” Hair treatments can damage hair by changing its chemical content.
The 16th-century mummy's hair was well-preserved due to a calcium coating.
December 2018 in “72° Congresso di Anatomia e Istologia” Micro-grafts improved hair growth in patients with hair loss.
22 citations
,
September 2000 in “Journal of Investigative Dermatology” μ-Crystallin may help hair growth by affecting thyroid hormone levels in mouse hair follicles.
2 citations
,
August 2012 in “Journal of the American Academy of Dermatology” Two patients with the same genetic mutation had both blistering skin and easily pulled out hair.
1 citations
,
August 1981 in “The Journal of Dermatology” All major hair defects involve cuticle abnormalities.
February 2019 in “PubMed” The research found that twisting hair fibers can show changes in stiffness and damage, and help tell apart different hair treatments.
January 2006 in “Dianzi xianwei xuebao” Netherton syndrome causes specific skin and hair changes that help in early diagnosis.
93 citations
,
July 2006 in “Journal of Investigative Dermatology” K25, K27, and K28 are found in all inner root sheath layers of hair, while K26 is only in the cuticle.
8 citations
,
July 2015 in “International Journal of Dermatology” A new DSG4 gene mutation causes hair defects in a young girl.
7 citations
,
September 2021 in “Journal of Applied Polymer Science” Cuttlefish ink melanin protects hair from UV damage.
1 citations
,
January 2007 in “AIP conference proceedings” High-resolution x-ray images showed three main structures in human hair: medulla, cortex, and cuticle.
4 citations
,
July 2024 in “BMC Zoology” Dromedary camel hair structure and mineral content change with age.
46 citations
,
January 1991 in “Tissue and Cell” The male silkmoth's antenna develops olfactory structures over 21 days, with full hair formation by day 15.
March 2026 in “International Journal of Advanced Biochemistry Research” German shepherd hair varies in color and pattern but is flat with a consistent internal structure.
1 citations
,
January 2019 in “Zenodo (CERN European Organization for Nuclear Research)” Eclipta alba has unique stem, leaf, and root features, including air cavities and secretory structures.
January 2024 in “World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany” Polisorbate 20 is not suitable for curl creams due to instability.
January 2017 in “Clinical approaches and procedures in cosmetic dermatology” Cosmetic procedures can harm hair, but damage can be minimized with knowledge and care; however, once hair is damaged, it cannot be reliably repaired.
36 citations
,
October 2014 in “Langmuir” Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.
6 citations
,
January 2005 in “Han-guk hyeonmigyeong hakoeji/Applied microscopy” The 16th-century mummy's hair was well-preserved due to a calcium surface coat.
January 2026 in “Molecules” A new perming method is less damaging to hair and works as well as traditional methods.
28 citations
,
August 2005 in “Journal of Investigative Dermatology” TG5 helps maintain hair follicle health, while TG3 aids in hair shaft development.
16 citations
,
December 2016 in “ecancermedicalscience” Hair analysis may help detect breast cancer early by identifying changes in lipid content.
1 citations
,
June 2016 in “Medicina” Monilethrix is a genetic disorder causing brittle hair, diagnosed using tricoscopy.
A KRT32 gene variant causes loose anagen hair syndrome.
20 citations
,
December 2012 in “Journal of molecular structure” The study found that thioglycolic acid breaks down hair bonds more consistently than l-cysteine, which is less damaging to hair.
December 2023 in “Journal of molecular structure” Hair treatments and dehydration affect hair's lipid and protein behavior, influencing its flexibility and appearance.
25 citations
,
May 2019 in “Heliyon” Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.