June 2024 in “Journal of Clinical Medicine” This case study and literature review highlights a chemical burn from hair dye experienced by a 17-year-old girl, resulting in a long-term scalp ulcer. It emphasizes the need for careful consideration of scalp complications and a multidisciplinary treatment approach in hair dye procedures.
January 2016 in “International archives of medicine” In this study, a significant relationship was observed between hair coloring and both hair damage and scalp problems among students at the University of Sumatera Utara.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” In this study, researchers developed a herbal mehendi gel using natural plant-based ingredients aimed at providing sustainable hair coloring and scalp care. The formulation demonstrated beneficial properties including natural hair coloring, scalp conditioning, antimicrobial activity, antioxidant action, and safety with no observed skin irritancy.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study evaluated a herbal mehendi gel formulated for natural hair coloring and scalp care, finding it safe for topical use and demonstrating benefits like natural coloring and scalp conditioning.
May 2023 in “Health science reports” This review discusses the harmful effects of coloring shampoos containing trihydroxybenzene on the scalp-skin barrier and emphasizes the need for safer ingredient selection to prevent side effects.