Bleached Hair as a Standard Template to Evaluate the Performance of Commercial Hair Repair Products

    August 2024 in “ Cosmetics
    Eva Martins, Pedro M. Castro, Alessandra Braga Ribeiro, Carla F. Pereira, Francisca Casanova, R. Vilarinho, J. Agostinho Moreira, Óscar L. Ramos
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    TLDR K18® and Olaplex® both effectively repair bleached hair, improving its strength, smoothness, and overall health.
    The study compared the performance of K18® and Olaplex® hair repair products on bleached hair using various analytical techniques. Both products significantly improved hair brightness, surface morphology, and protein content compared to untreated bleached hair. SEM and AFM analyses revealed smoother hair surfaces post-treatment. FTIR and Raman spectroscopy indicated better preservation of disulfide bonds. Thermal analysis demonstrated enhanced thermal stability, and mechanical tests showed increased tensile strength and extensibility. Overall, both K18® and Olaplex® effectively repaired bleached hair, with statistically significant improvements in multiple hair properties.
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