25 citations
,
May 2019 in “Heliyon” Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.
Moisture makes hair flexible for reshaping during blowouts.
4 citations
,
August 2014 in “Journal of molecular structure” Chemical treatments on bleached black hair change its internal structure by breaking and reforming bonds, and treatments with hydrolyzed eggwhite protein help repair it.
April 2025 in “International Journal of Cosmetic Science” A new hair perming method avoids damage and lasts longer than traditional methods.
3 citations
,
January 2021 in “ScienceAsia” Using an enzyme and keratin treatment can significantly repair and strengthen damaged hair.
1 citations
,
April 2013 in “Pakistan Journal of Biological Sciences” Hair coloring, waving, and ironing cause more hair damage than not using these treatments.
December 2023 in “Data in Brief” Curly hair's strength and flexibility vary with moisture and temperature.
July 2009 in “International Journal of Cosmetic Science” Japanese women's curved hair has an uneven internal structure and varied amino acid composition.
Applying conditioner in the middle of a perm process reduces hair damage.
November 2001 in “PubMed” Perming, combing, and stretching damage hair by reducing keratin.
2 citations
,
January 2015 in “Sen'i Gakkaishi” Washing permed hair after using thioglycolic acid helps reform strong bonds, making hair stronger.
January 2013 in “Sen'i Gakkaishi” Microfibrils are key for permanent waves, and hydrolyzed keratin improves wave formation and hair condition.
January 2026 in “Colloids and Surfaces B Biointerfaces” A silicone treatment makes damaged hair more water-resistant and stronger.
November 2025 in “Advanced Healthcare Materials” Charge-conversion chemistry improves hair-rebonding by enhancing penetration and strength.
October 2023 in “Materials chemistry and physics (Print)” Adding keratin to a mix of cow hair and plant-based plastic makes it stronger.
Perming, combing, and stretching damage hair by reducing keratin levels.
37 citations
,
October 2015 in “PeerJ” Perming significantly changes hair's molecular structure, while shampoo and conditioner do not.
February 2022 in “Cosmetic Dermatology” Permanent hair waving uses chemicals to create long-lasting curls.
10 citations
,
January 2012 in “International Journal of Cosmetic Science” Thioglycolic acid mainly affects the unordered areas in hair structure.
2 citations
,
January 2002 in “PubMed” The new test shows how hair treatments affect hair's bending stiffness by swinging a pendulum through hair fibers.
September 2019 in “University of the Arts London Research Online (University of the Arts London)” Plant oils and polymers can help protect African hair from damage during styling.
1 citations
,
January 2009 in “Journal of S C C J” Changing disulfide bonds in human hair affects its melting behavior and thermal stability.
January 2017 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” Sunlight and chemical treatments change hair's internal structure differently, needing specific care.
4 citations
,
June 2022 in “ACS applied materials & interfaces” New wig coating technique makes them more durable, UV resistant, and less static.
28 citations
,
November 2009 in “Journal of Structural Biology” High flux X-ray beams quickly damage the structure of human hair.
August 2021 in “Han'gug miyong haghoeji/Journal of the Korean society of cosmetology” Using natural polyphenol cross-linkers like tannic acid and green tea extract in perm treatments improves curling and protects hair.
85 citations
,
October 2007 in “International Journal of Dermatology” Curly hair shape is due to uneven growth patterns in the hair follicle.
3 citations
,
August 2008 in “PubMed” Repeated digital perming with sodium thioglycolate lotion significantly damages hair protein and structure.
11 citations
,
May 2016 in “PubMed” New imaging and testing methods can effectively assess hair shape changes and damage.