27 citations
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January 1995 Melanin in black hair protects it from sun damage better than light-brown hair.
1 citations
,
February 2003 UV radiation causes significant protein loss and color changes in hair, especially blond hair.
10 citations
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March 2016 in “Toxicology and applied pharmacology” Using A132 hair dye with sunlight can cause skin damage and hair loss.
1 citations
,
June 2016 in “Experimental Dermatology” Metabolomics can identify hair damage markers, but its use in creating treatments is uncertain.
May 2026 in “International Journal of Health Management Review” Alkaline substances can severely damage hair and scalp health.
8 citations
,
January 2016 in “Journal of fiber science and technology” Bleaching hair increases cysteic acid levels in a predictable way.
June 2024 in “Journal of Clinical Medicine” Hair dye can cause severe scalp burns and long-term health risks, so safety guidelines must be followed.
December 2025 in “Cosmetics” The bio-based complex effectively repairs and protects chemically damaged hair.
September 2025 in “International Journal of Cosmetic Science” Heat and UV exposure damage hair structure by altering keratins.
June 2024 in “Georgetown Scientific Research Journal” Bleomycin injections in mice cause skin thickening and hair loss.
157 citations
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April 1997 in “International journal of legal medicine” Cosmetic hair treatments like bleaching and dyeing reduce drug levels in hair samples.
January 2008 in “대한미용학회지” UV exposure severely damages hair, making it rough and weak.
14 citations
,
September 2016 in “Journal of Photochemistry and Photobiology B Biology” UV exposure damages hair, increasing thiols and altering protein structure.
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.
19 citations
,
April 2021 in “Journal of Cosmetic Dermatology” The treatment with silk proteins and linseed polysaccharides effectively protects and repairs chemically damaged hair.
November 2017 in “Koubunshi rombunshuu/Kōbunshi ronbunshū” Hematin in shampoo helps repair and straighten damaged hair.
November 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Hair dyeing changes hair structure, but new technologies help protect hair while coloring.
1 citations
,
January 2010 in “LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas)” Conditioners improved hair protein retention and combing ease, with some providing thermal protection.
12 citations
,
December 2017 in “Food and chemical toxicology” Permanent hair dye mixtures can irritate and damage the skin.
66 citations
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September 2005 in “Photochemical & photobiological sciences” We don't fully understand how sunlight damages different types of hair.
January 2025 in “International Journal of Cosmetic Science” Citric acid strengthens and improves damaged hair.
2 citations
,
January 1981 High temperatures and certain chemicals can significantly change the amino acid content in human hair.
January 1994 in “Journal of the society of cosmetic chemists” October 2014 in “University of the Arts London Research Online (University of the Arts London)” Protein-derived ingredients can help strengthen bleached hair.
June 2016 in “한국디자인문화학회지” UVA damages all hair types, especially permanently waved and colored hair.
13 citations
,
March 2010 in “International Journal of Cosmetic Science” Hair coloring increases copper and calcium uptake, damaging hair and reducing shine.
34 citations
,
January 2011 in “Annals of dermatology/Annals of Dermatology” Using a hair dryer at 15 cm with continuous motion causes less damage than natural drying.
3 citations
,
May 2009 in “International Journal of Cosmetic Science” Relaxer treatments damage African–American hair, with commercial products causing more harm than lab-made solutions.
November 2022 in “International journal of trichology” Glyoxylic acid straighteners cause more protein loss but have similar hair strength effects as traditional alkaline straighteners.
8 citations
,
January 2018 in “Journal of cosmetic dermatology” Conditioners in hair dye reduce damage and improve combability.