Assessing the Effect of Cleansing Products on Artificially Polluted Human Hairs and Skin Through In Vivo and In Vitro Models

The study evaluated the effectiveness of various hair care products in removing and preventing pollution-related deposits on hair and skin using in vivo and in vitro models. Researchers used artificial sebum mixed with Carbon Black particles to simulate pollution effects and tested 42 shampoo formulas, finding cleanability efficiencies ranging from 5% to 100%. Additionally, 45 hair care products were assessed for their ability to prevent carbon particle deposition, with coverage percentages between 2% and 16%. The study concluded that the new protocols effectively quantified the performance of hair care products in cleansing and protecting hair from pollution, supporting the development of new cosmetic products to mitigate pollution's impact on hair properties. The research was supported by L'Oréal, with all authors affiliated with the company.