December 2022 in “Journal of Tropical Pharmacy and Chemistry” This study evaluated a hair tonic formulated from oil palm leaf extract, finding it demonstrated very strong antioxidant activity and could prevent hair decolorization from sun exposure, with effective concentrations ranging from 25 to 200 ppm.
In this study, researchers found that aloe vera hair tonic preparations containing 10% and 15% extract concentrations significantly enhanced hair growth in rats and remained physically stable across various temperature conditions.
June 2024 in “JURNAL PENDIDIKAN DAN KELUARGA” This experimental study evaluated celery extract as a hair tonic, finding it contains vitamin A and flavonoids. Organoleptic and pH tests indicated favorable smell, color, absorption, and user preference, supporting its potential as a natural ingredient for hair health applications.
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November 2021 in “Jurnal Farmasi Indonesia” In this study, three hair tonic formulas containing Kayu Secang extracts demonstrated hair growth activity in rabbits, with the chloroform-methanol fraction showing the most significant results.
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December 2019 in “JURNAL BIOSAINS” This study evaluated krokot extract as a hair tonic and found it to be microbiologically safe, effective at extending and increasing hair weight, non-irritating, and generally well-received in terms of aroma and color when tested on rabbits.
