May 2024 in “Jurnal Penelitian Farmasi dan Herbal” In this experimental study using male rabbits, researchers found that a 7.5% concentration of green tea leaf ethanol extract hair tonic was nearly as effective in promoting hair growth as the positive control, minoxidil, over a 21-day period.
January 2025 in “Termometer Jurnal Ilmiah Ilmu Kesehatan dan Kedokteran” In this study, researchers tested a tea leaf ethanol extract (Camellia sinensis) hair tonic and found it increased average hair growth compared to positive and negative controls over 28 days, but exhibited some instability and inhomogeneity after accelerated testing.
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August 2020 in “Majalah Farmasetika” This review concluded that a herbal hair tonic formulated with 2.5% green tea leaf extract, in combination with specific solvents and additives, showed the best properties for stimulating hair growth.
July 2019 in “Majalah Obat Tradisional” This study reported that a 4% water fraction of green tea leaf extract showed the most effective hair growth promotion in rabbits.
December 2024 in “Proceeding International Collaborative Conference on Multidisciplinary Science” In this study, researchers developed a shampoo using ambon banana peel and green tea leaves, reporting that it showed positive characteristics and was safe for addressing hair loss, with optimal viscosity levels achieved in certain formulations.