May 2024 in “Jurnal Penelitian Farmasi dan Herbal” Green tea leaf extract at 7.5% concentration effectively promotes hair growth, similar to minoxidil.
January 2025 in “Termometer Jurnal Ilmiah Ilmu Kesehatan dan Kedokteran” Tea leaf extract tonic promotes hair growth better than controls but has stability issues.
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August 2020 in “Majalah Farmasetika” A herbal hair tonic with 2.5% green tea extract is most effective for hair growth.
December 2021 in “Ad-Dawaa' Journal of Pharmaceutical Sciences” Green tea and celery leaf extracts in hair tonic promoted hair growth in guinea pigs, with the best results at specific concentrations.
December 2022 in “Journal of Tropical Pharmacy and Chemistry” The hair tonic made from oil palm leaf extract is very effective in preventing hair damage from the sun.