April 2025 in “Jurnal Analis Farmasi” This study evaluated hair tonic formulations containing Ambon banana peel extract and found that the preparation, particularly at an 8% concentration, significantly promoted hair growth compared to other formulations, though it still differed from the control group's effectiveness.
September 2023 in “Jurnal MIPA (edisi elektronik)” This study formulated and evaluated the physical stability of hair tonic preparations using lime extract (Citrus aurantifolia) at varying concentrations. The researchers found that the tonics exhibited good physical stability, as indicated by meeting Indonesian National Standards, even after undergoing temperature cycling tests.
March 2023 in “Jurnal Ilmiah Medicamento” In this study, herbal hair tonic made from Usada Bali ingredients significantly increased hair growth in mice without causing skin irritation compared to a negative control.
May 2023 in “Pharma xplore : jurnal sains dan ilmu farmasi” In an animal study, researchers found that a hair tonic containing a 1:1 ratio of kelor and rambutan leaf extracts led to similar hair growth in rabbits compared to a minoxidil control, with average hair lengths of 3 cm versus 2.025 cm, respectively.
June 2022 in “Jurnal Health Sains” This review discusses plant-based alternatives for hair tonic formulations to address hair loss and contains no new clinical results, advocating for plant extracts as safer options than synthetic ingredients.