Water and fatty acids affect hair's surface differently based on hair damage, and models can help understand hair-cosmetic interactions.
November 2022 in “Research Square (Research Square)” Keratin-associated proteins have ancient origins and were used for different purposes before being adapted for hair in mammals.
November 2020 in “Research Square (Research Square)” Keratin injections in mice can stimulate hair growth and might help treat hair loss.
July 2020 in “The journal of investigative dermatology/Journal of investigative dermatology” The enzymes Tet1, Tet2, and Tet3 are important for the development of hair follicles and determining hair shape by controlling hair keratin genes.
74 citations,
October 1998 in “Journal of biological chemistry/The Journal of biological chemistry” The 190-kbp domain contains all human type I hair keratin genes, showing their organization and evolution.
32 citations,
February 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” Two specific hair keratin genes are active during hair growth and decline as hair transitions to rest.
17 citations,
July 2018 in “International Journal of Cosmetic Science” Keratin-based particles safely improve hair strength, smoothness, and heat protection.
8 citations,
May 2020 in “International journal of biological macromolecules” Certain treatments can increase protein binding to natural hair but are less effective on permed hair.
7 citations,
February 1998 in “Polymer journal” Keratin structure in hair is stable at pH 5-6 but disrupts between pH 6-7.
1 citations,
November 2023 in “Polymer International” The keratin-graphene oxide composite is stronger, more heat resistant, and better at blocking gases than pure keratin, offering an eco-friendly use for waste hair.
1 citations,
September 2023 in “ACS Biomaterials Science & Engineering” Human hair keratin hydrogels show promise for use in regenerative medicine.
1 citations,
January 1989 in “Springer eBooks” 
February 2024 in “Scientific Reports” The wolves suspected of man-eating in the 1880s likely ate very little human flesh and mostly consumed a diet similar to herbivores and omnivores.
January 2024 in “Molecules (Basel. Online)” Juglone from walnut extracts may help repair damaged hair.
August 2023 in “Drug Delivery and Translational Research” Human hair keratin was used to create a scaffold that could help with skin repair.
July 2020 in “The journal of investigative dermatology/Journal of investigative dermatology” A mutation in the KRT82 gene is significantly associated with Alopecia Areata.
16 citations,
January 2017 in “Physical chemistry chemical physics/PCCP. Physical chemistry chemical physics” The 3D structure of a key hair protein was modeled, revealing specific helical structures and stabilization features.
December 2022 in “Communications biology” 
December 2022 in “Communications biology” 49 citations,
April 2010 in “International Journal of Cosmetic Science” The study examined very long human hair (over 2.4 m) to understand the natural ageing process of hair keratin fibers using various evaluation methods. It focused on hair that had not been exposed to chemical treatments like bleaching or dyeing. The findings showed that ageing begins with the abrasion of the cuticle while the cortex remains intact up to about 1 m from the root, maintaining shine, hydrophobicity, and friction characteristics. Beyond this point, significant cuticle damage occurs, correlating with a decline in ceramides, 18-Methyl Eicosanoic Acid (18-MEA), and keratin-associated proteins, leading to a decrease in mechanical and optical properties. This research provided a detailed 'damage scale' of hair ageing, which could aid in developing targeted hair care products.
1 citations,
January 2021 in “Research journal of pharmacy and technology” 5 citations,
February 2007 in “Cytology and genetics” 47 citations,
September 2011 in “Acta biomaterialia” Protein composition greatly affects the function of keratin biomaterials.
29 citations,
August 2005 in “Biopolymers” L-cysteine slows down the breaking of bonds in hair due to electrostatic interactions.
20 citations,
June 2012 in “British Journal of Dermatology” Bleaching hair damages protein structure, especially keratin, leading to weakened hair.
17 citations,
June 2003 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” Mutations in hKAP1 genes may cause hereditary hair disorders.
14 citations,
December 2016 in “PloS one” Keratin 26 affects cashmere goat hair growth and is influenced by various treatments.
7 citations,
October 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.
1 citations,
June 2023 in “International journal of biological macromolecules” Human hair proteins can help blood clot when mixed in equal parts.