In Vivo and In Vitro Evaluation of PTeCA (1H-Pyrrole-2,3,4,5-Tetracarboxylic Acid) in Hair Matrix as a Marker for Oxidative Cosmetic Treatment

    March 2026 in “ Drug Testing and Analysis ”
    Sara Casati, Alessandro Ravelli, Roberta F. Bergamaschi … Alessio Battistini
    Studysummary This study observed that the degradation product PTeCA significantly increased in hair treated with oxidative cosmetics, suggesting it could be a reliable marker for detecting such treatments, with a proposed PTCA cut-off value using PTeCA as the gold standard.
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    Research cited in this study 2

    1. Cheating on Forensic Hair Testing? Detection of Potential Biomarkers for Cosmetically Altered Hair Samples Using Untargeted Hair Metabolomics Analyst · 2020
    2. Influence of Thermal Hair Straightening on Cannabis and Cocaine Content in Hair Forensic Science International · 2016