12 citations
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December 2021 in “Aging” A new painless method to collect hair follicles helps study DNA damage and aging.
3 citations
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May 2009 in “International Journal of Cosmetic Science” Relaxer treatments damage African–American hair, with commercial products causing more harm than lab-made solutions.
July 2025 in “Journal of Investigative Dermatology” BrdU speeds up hair follicle aging and reduces hair quality.
September 2022 in “International Journal of Health Sciences (IJHS)” Low zinc levels may contribute to hair loss due to increased oxidative DNA damage.
April 2015 in “The FASEB Journal” Nitrogen mustard causes DNA damage and structural changes in mouse skin hair follicles, but some recovery occurs after 5 days.
66 citations
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September 2005 in “Photochemical & photobiological sciences” We don't fully understand how sunlight damages different types of hair.
3 citations
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January 2021 in “ScienceAsia” Using an enzyme and keratin treatment can significantly repair and strengthen damaged hair.
16 citations
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November 2009 in “Experimental dermatology” Ionizing radiation damages human hair follicles by stopping cell growth, causing cell death, disrupting color, and increasing stress and damage markers.
59 citations
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January 2013 in “Annals of Dermatology” Asian hair is more resistant to UV damage due to higher lipid content.
23 citations
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June 1993 in “PubMed” Medication 1 improved hair quality and growth more effectively than medication 2 and the placebo.
4 citations
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November 2017 in “PubMed” Miracle fruit seed oil significantly reduces hair breakage in women with damaged hair.
4 citations
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May 2014 in “PubMed” Monoethanolamine-based hair colorants can cause more damage to hair than ammonia-based ones.
3 citations
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June 2024 in “Journal of Cosmetic Dermatology” UV rays and pollution increase hair damage.
January 2024 in “Molecules (Basel. Online)” Juglone from walnut extracts may help repair damaged hair.
January 2011 in “Journal of Society of Cosmetic Chemists of Japan” 18-MEA and SPDA can restore damaged hair's smoothness and reduce frizz.
January 2005 in “Seibutsu Butsuri/Seibutsu butsuri” Chemical treatments damage hair more than UV exposure, making it thinner and less flexible.
2 citations
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July 2012 in “PubMed” Ceramide-rich liposomes can effectively repair and strengthen damaged hair.
December 2025 in “Asian Journal of Beauty and Cosmetology” Soybean oil extract improves the condition of damaged hair.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” Damaged hair follicle stem cells may leave the skin to help maintain youthfulness.
September 2018 in “University of the Arts London Research Online (University of the Arts London)” L-arginine, hydrolysed keratin, and cystine-silanol copolymer can help protect hair from damage during and after bleaching.
27 citations
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February 1991 Cuticle damage doesn't affect hair's tensile strength; the cortex is responsible for it.
March 2024 in “JEADV. Journal of the European Academy of Dermatology and Venereology/Journal of the European Academy of Dermatology and Venereology” Hair transplant surgery using micropunch can cause blood vessel damage similar to vasculitis in some cases.
1 citations
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January 2013 in “Chronicles of young scientists” Immuno-cosmeceuticals from chicken egg yolk can effectively repair and improve damaged hair.
40 citations
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February 2002 in “International Journal of Dermatology” Permanent hair dye damages hair but it mostly recovers after 8 weeks; using certain hair care products can help repair it.
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.
18 citations
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August 2008 in “Journal of Investigative Dermatology” 17-β estradiol and prednisolone may speed up hair regrowth after chemotherapy.
11 citations
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May 2016 in “PubMed” New imaging and testing methods can effectively assess hair shape changes and damage.
7 citations
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January 1995 Silicone pretreatment protects hair from damage and reduces color fading without interfering with bleaching or dyeing.
2 citations
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December 2013 in “Journal of Cosmetic Dermatology” UV treatment can damage hair, so protection is advised.
2 citations
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January 1981 High temperatures and certain chemicals can significantly change the amino acid content in human hair.