34 citations
,
October 1982 in “Journal of applied polymer science” Moisture content significantly affects how human hair breaks.
August 2007 in “Microscopy and Microanalysis” Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.
3 citations
,
January 2002 in “Springer eBooks” Alkaline hair relaxers damage hair, but cationic and non-ionic polymers can help reduce this damage.
NaOH treatment improves hair strength and suitability for textiles.
September 2024 in “Heliyon” Repeated hair dyeing significantly damages hair.
47 citations
,
November 2007 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” Healthy hair is shiny, smooth, and has clean ends.
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.
February 2025 in “Brazilian Journal of Hair Health” The Brazilian candle flame technique can damage hair by melting the cuticle and exposing the cortex.
January 2012 in “Human health handbooks” Low-level light therapy is FDA-approved for male pattern hair loss, increases hair count and strength, and is considered safe for use.
March 2005 in “Journal of the American Academy of Dermatology” Adding amino acids to damaged hair can improve its strength and appearance.
328 citations
,
November 2020 in “Nature Materials” Hydrogel scaffolds can help wounds heal better and grow hair.
163 citations
,
October 2001 in “EMBO journal” Overexpressing follistatin in mice delays wound healing and reduces scar size.
January 2026 in “Journal of Applied Polymer Science” The new fiber offers long-lasting minoxidil release and can be used in wigs for hair treatment and coverage.
60 citations
,
February 2014 in “Tissue Engineering Part A” Microporous scaffolds speed up skin healing and regeneration.
41 citations
,
July 2020 in “Colloids and surfaces. B, Biointerfaces” Different hair protein amounts change the strength of keratin/chitosan gels, useful for making predictable tissue engineering materials.
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.
1 citations
,
March 2005 in “International Journal of Cosmetic Science” Twisting hair weakens it, but strength can be recovered at low twist levels.
42 citations
,
April 2008 in “Acta materialia” Different ethnicities and treatments affect human hair strength and structure.
38 citations
,
December 2019 in “Iranian Biomedical Journal” Hair follicle stem cells help burns heal faster and stronger.
45 citations
,
December 2006 in “Biopolymers” Permanent waving weakens hair by altering its protein structure.
3 citations
,
September 2020 in “Journal of cosmetic dermatology” Coconut oil makes hair stronger and more flexible than mineral oil.
22 citations
,
February 2013 in “Wound Repair and Regeneration” Mice genetically modified to produce more CD109 in their skin had less inflammation and better healing with less scarring.
December 2025 in “The American Journal of Medical Sciences and Pharmaceutical Research” Ultrasonic and infrared treatments can improve hair strength and appearance with minimal damage.
81 citations
,
December 2007 in “Acta materialia” AFM helped show how hair changes under tension and the effects of damage and conditioner.
11 citations
,
July 2021 in “Sustainability” Concrete made from animal bones and human hair is stronger and more environmentally friendly than traditional concrete.
6 citations
,
May 2020 in “Molecules/Molecules online/Molecules annual” Yak belly hair has higher porosity and is less stiff than human hair, making it absorb dye better but less suitable as a direct substitute for hair dyeing.
1 citations
,
March 2019 in “International Journal of Cosmetic Science” The model predicts hair breakage based on key hair properties and helps product developers.
36 citations
,
April 2013 in “Cell and Tissue Research” Bone-marrow and epidermal stem cells help heal wounds differently, with bone-marrow cells aiding in blood vessel formation and epidermal cells in hair growth.
March 2026 in “ACS Applied Bio Materials” The TO-TF copolymer strengthens damaged hair effectively and sustainably.
11 citations
,
April 2022 in “Biophysical Journal” Disulfide bonds in keratin fibers break more easily under stress, especially when wet, affecting fiber strength.