7 citations
,
September 2020 in “International Journal of Cosmetic Science” Different sizes of keratin peptides can strengthen hair, with smaller ones possibly increasing volume and larger ones repairing damage.
6 citations
,
January 1997 in “Medical Mycology” The fungus Piedraia hortae damages hair by slowly breaking down its layers, leading to long-lasting infection.
3 citations
,
October 2020 in “Dermatology Practical & Conceptual” Bubble hair damage is caused by high heat from styling tools, and trichoscopy helps diagnose it.
3 citations
,
March 2009 in “Hirosaki University Repository for Academic Resources (Hirosaki University)” Hirosaki hairless rats have sparse, twisted hair due to missing hair keratin genes.
3 citations
,
August 1980 in “Acs Symposium Series” Hair increases in size when it absorbs water, and treatments like bleaching affect how much water it can take in.
2 citations
,
January 2011 Relaxers straighten African hair by breaking down its helical structure using strong bases.
1 citations
,
January 2018 in “Acta dermato-venereologica” A teenager's hair with alternating white and dark bands, known as Pili annulati, is a genetic condition that is usually harmless and often considered attractive.
1 citations
,
May 2013 in “PubMed” Glycylglycine makes hair softer by improving alignment and changing hair's internal properties.
May 2026 in “Journal of Photochemistry and Photobiology” This critical review examines the oxidative damage to human hair caused by solar radiation and pollution, highlighting that protein and lipid oxidation lead to structural breakdown. The study finds that UVB radiation primarily affects the hair cuticle, while UVA and visible light impact the cortex, with light-colored and bleached hair suffering the most damage. The review emphasizes that solar radiation is the primary damaging factor, but trace metals, air-borne pollution, and hair care practices also contribute to hair degradation. Strategies for hair protection should consider the specific combination of hair characteristics and environmental exposures, referred to as the "hair exposome."
December 2025 in “Universal library of medical and health sciences.” Amino acids like arginine and cysteine protect hair during chemical treatments, keeping it strong and less brittle.
October 2024 in “UNESP Institutional Repository (São Paulo State University)” Straightening and dyeing damage hair structure.
May 2024 in “International Journal of Cosmetic Science” A new method using near-infrared light can effectively detect and analyze internal hair damage.
April 2024 in “Cosmetics” Different oils affect hair flexibility and strength, with their impact varying on whether hair is virgin or bleached.
Hyaluronic acid in shampoo penetrated hair well, reduced frizz, and improved hair strength and moisture.
January 2019 in “Durham e-Theses (Durham University)” Advanced microscopy shows hair damage and keratin proteins' roles, aiding future cosmetic treatments.
January 2017 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” Sunlight and chemical treatments change hair's internal structure differently, needing specific care.
January 2010 in “Nihon Hou Kagaku Gijutsu Gakkaishi” The modified staining method can determine the ABO blood group of hair samples accurately.
April 2007 in “Linchuang pifuke zazhi” TGF-β1 and 2 may play a role in hair loss in AGA.
February 2005 in “CRC Press eBooks” Hair color is due to active pigment cells in hair during growth.
May 2026 in “International Journal of Cosmetic Science” Ozonated water damages hair structure and proteins.
January 2023 in “Open Life Sciences” VEGFR-2 activation is likely involved in hair follicle growth, survival, and development.
61 citations
,
February 1997 in “Differentiation” Hair differentiation starts earlier than thought, involving multiple type-II keratins.
29 citations
,
July 2004 in “The journal of investigative dermatology/Journal of investigative dermatology” The enzymes Aldh1a2 and Aldh1a3 are involved in making retinoic acid in hair follicles and have different roles in hair growth.
12 citations
,
July 2015 in “British journal of dermatology/British journal of dermatology, Supplement” Curly hair breaks due to mechanical damage and environmental factors, not chemical makeup, and needs ongoing care to prevent breakage.
8 citations
,
January 2012 in “International journal of polymer analysis and characterization/IJPAC. International journal of polymer analysis and characterization/IJPAC. International journal of analysis and characterization” Hydrogenated palm oil repairs and conditions damaged hair by preventing swelling.
June 2023 in “Brazilian Journal of Health Review” Hair transplantation improves life quality and self-esteem in men with male pattern baldness.
85 citations
,
October 2007 in “International Journal of Dermatology” Curly hair shape is due to uneven growth patterns in the hair follicle.
40 citations
,
April 1999 in “Journal of Histochemistry & Cytochemistry” S100A3 protein is mainly found in specific parts of human hair cells.
38 citations
,
October 2011 in “Analytical biochemistry” Hair proteins have weak spots in their α-helical segments.
31 citations
,
December 2002 in “Biochimica et biophysica acta. G, General subjects/Biochimica et biophysica acta. General subjects (Online)” The research found two types of calcium in human hair, one that varies among individuals and another that is consistent across people.