October 2015 in “Cosmetic Dermatology” Hair styling products and tools help improve hair's look and manageability but can damage hair if used incorrectly.
January 2026 in “International Journal of Biological Macromolecules” Small KP peptide improves hair without reducing agents, while larger proteins need them for better results.
December 2025 in “Biopolymers” Heat worsens damage in chemically treated hair, especially bleached and straightened hair.
April 2023 in “CRC Press eBooks” Hair care products mainly work on the hair's surface and need professional guidance for use.
September 2011 in “Daehan miyong hakoeji” Henna orange powder, especially with alkali, protects and colors hair better than oxidizing colorants.
16 citations
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May 2017 in “Journal of cosmetic dermatology” An unhealthy scalp can damage new hair, but using ZPT shampoo can improve hair health.
August 1985 in “Proceedings ... annual meeting, Electron Microscopy Society of America/Proceedings, annual meeting, Electron Microscopy Society of America” Hair dye can damage dog hair and cause health issues.
January 2024 in “Uttar Pradesh journal of zoology” Chemical treatments severely damage hair cuticles, especially in previously treated hair.
March 1997 in “Medical Molecular Morphology” Zinc deficiency causes early scalp hair damage that recovers slower than skin symptoms.
10 citations
,
November 2016 in “International Journal of Cosmetic Science” A tough membrane between the outer and inner layers of human hair protects it from damage.
9 citations
,
July 2014 in “Skin research and technology” Stretching damages Caucasian hair's structure more easily than Asian hair.
November 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Oxidative dyes damage hair more than semi-permanent dyes, but new technologies help protect hair while coloring.
November 2025 in “International Journal of Science and Research Archive” Oxidative dyes damage hair more than semi-permanent dyes, but new technologies help protect hair while coloring.
14 citations
,
September 2016 in “Journal of Photochemistry and Photobiology B Biology” UV exposure damages hair, increasing thiols and altering protein structure.
4 citations
,
August 2021 in “Journal of the Korean Society of Cosmetology” Plasma hairdryers cause less hair damage than regular hot air dryers.
9 citations
,
January 2011 in “Journal of X-ray science and technology” Perming and bleaching damage hair differently, with bleached hair having more cysteic acid in the cuticle.
7 citations
,
January 2001 in “Comprehensive series in photosciences” UV radiation significantly damages hair, especially with humidity, making it more vulnerable to further damage.
3 citations
,
January 2002 in “Springer eBooks” Alkaline hair relaxers damage hair, but cationic and non-ionic polymers can help reduce this damage.
2 citations
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January 2008 in “Journal of Society of Cosmetic Chemists of Japan” PMS nanoparticles improve damaged hair by protecting and restoring its surface and color.
September 2024 in “Heliyon” Repeated hair dyeing significantly damages hair.
January 1991 in “Journal of Society of Cosmetic Chemists of Japan” Hair treatments can damage hair by changing its chemical content.
1 citations
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December 2022 in “Journal of applied biological chemistry” TRP-hair essence protects hair from heat damage, maintains color, and strengthens hair.
November 2017 in “Koubunshi rombunshuu/Kōbunshi ronbunshū” Hematin in shampoo helps repair and straighten damaged hair.
23 citations
,
August 2019 in “Proceedings of the National Academy of Sciences of the United States of America” Pollution exposure speeds up hair damage.
February 2025 in “Brazilian Journal of Hair Health” The Brazilian candle flame technique can damage hair by melting the cuticle and exposing the cortex.
27 citations
,
January 1995 Melanin in black hair protects it from sun damage better than light-brown hair.
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.
6 citations
,
January 2005 in “PubMed” Cotton honeydew extract improves hair smoothness and reduces damage.
October 2024 in “UNESP Institutional Repository (São Paulo State University)” Straightening and dyeing damage hair structure.
25 citations
,
February 2007 in “Forensic science international” Different hair cleaning methods caused varying levels of damage to the hair's outer layer.