2 citations
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March 2005 in “International Journal of Cosmetic Science” Human hair structure varies by ethnicity, and certain treatments can improve hair condition and appearance.
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November 2003 in “PubMed” Chemical treatments and light exposure damage hair proteins.
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October 2015 in “PeerJ” Perming significantly changes hair's molecular structure, while shampoo and conditioner do not.
To repair damaged hair, use products with proteins, lipids, and moisture like keratin, citric acid, and oils.
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January 2017 in “RSC Advances” Keratin peptides can change hair shape gently without harsh chemicals.
March 2023 in “Reactions Weekly” January 2023 in “Reactions Weekly” January 2023 in “Reactions Weekly” January 2023 in “Reactions Weekly” 10 citations
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January 1994 Hair can be straightened using different chemicals, not just strong alkali.
February 2010 in “Journal of the American Academy of Dermatology” The shampoo and conditioner improved dry, damaged hair significantly after three uses.
May 2009 in “International Journal of Cosmetic Science” Permanent waving damages hair protein and weakens hair, especially with repeated treatments using sodium thioglycolate.
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February 2005 in “Biopolymers” Chemical hair straightening changes hair proteins and mostly fixes broken bonds.
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July 1987 in “Dermatologic Clinics” Oxidized hair can naturally regain strength and stability over six months.
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September 2008 in “International Journal of Cosmetic Science” Using chelants in hair dye reduces fiber damage by preventing harmful radicals.
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August 2021 in “Cosmetics” The best shampoo formula used 1% high-weight hyaluronic acid, 10% acidic sophorolipid, and 1% salt for effective hair conditioning and cleansing without sulfates or silicones.
June 2015 in “Reactions weekly” December 2012 in “Reactions weekly” 85 citations
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January 1990 Restolin Hair Supplement may help hair growth but lacks FDA approval and clinical trial evidence.
April 2025 in “Pharmaceuticals” APA is a promising new compound for repairing damaged hair, outperforming Olaplex® in strength and elasticity.
Chemical treatments weaken hair's thermal stability and structure.
March 2025 in “Digital Library of Theses and Dissertations (Universidade de São Paulo)” Ferulic acid and resveratrol protect hair from chemical and sun damage.
August 2023 in “Journal of Health and Beauty” K-30 treatment restores protein and weight in damaged hair, making it similar to healthy hair.
August 2024 in “Advanced Healthcare Materials” RK81 can help promote hair growth.
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April 2008 in “Journal of Dispersion Science and Technology” Shampoos with more than 0.6% of cationic minoxidil particles can promote hair growth.
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January 1981 Nucleophilic reagents break down hair keratin, forming more lanthionine and lysinoalanine than in wool.
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August 2008 in “PubMed” Repeated digital perming with sodium thioglycolate lotion significantly damages hair protein and structure.
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May 2020 in “International journal of biological macromolecules” Certain treatments can increase protein binding to natural hair but are less effective on permed hair.