December 2025 in “Cosmetics” In a laboratory study, researchers found that a novel Bioactive Crosslink Repair Complex improved both the protection and repair of chemically damaged hair, enhancing tensile strength, shine, and cuticle alignment when added to bleaching mixtures and leave-in conditioners.
April 2019 in “Digital Library of Theses and Dissertations (Universidade de São Paulo)” This study found that the acidic hair straightening formulation at pH 1.0 improved hair alignments and straightening effectiveness more than pH 2.0, but it weakened fiber strength and affected hair color and composition.
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August 2022 in “Chemical engineering journal advances” This study demonstrated that human hair can be coated with Fe3O4 nanoparticles, allowing it to be oriented and moved by a magnetic field, which may enhance drug delivery and hair care applications.
September 2019 in “University of the Arts London Research Online (University of the Arts London)” This study tested the effects of protective pre-treatments on African hair and found that these treatments, combined with moderate grooming, may help maintain cuticle integrity.
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October 2014 in “Langmuir” This study concluded that bleach treatment partly transforms the hydrophobic top layer of human hair cuticles into a hydrophilic surface with clustered cysteic acid, visualized at the nano-scale using dynamic Chemical Force Microscopy.