May 2026 in “International Journal of Cosmetic Science” This study found that UV radiation exposure during a simulated Brazilian summer caused more significant mechanical damage to natural hair than bleaching, although both caused comparable structural alterations, with double bleaching leading to the most severe protein degradation.
10 citations
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June 2019 in “International Journal of Pharmaceutics” Hair removal methods damage the skin barrier and affect substance penetration.
2 citations
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July 2013 in “Fashion business” This study found that keratin essence effectively protected hair structure against dye-induced damage, potentially improving coloring efficiency in damaged hair observed from a single individual.
May 2026 in “DergiPark (Istanbul University)” In this study, researchers successfully scaled a plant-based shampoo formulation for dry and damaged hair from laboratory to industrial production, maintaining its physicochemical properties and microbiological safety throughout, highlighting the formulation's scalability and the importance of quality control in cosmetic manufacturing.
This study found that modern styling cosmetics can significantly alter hair structure through changes in interfacial chemistry and cohesion, particularly when applied to already damaged hair.