November 2022 in “Journal of Advances in Pharmacy Practices” This study found that a 5% concentration of terentang stem bark extract was the most effective in promoting hair growth in male rabbits.
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August 2012 in “Journal of Food Science” This study optimized conditions for extracting saponins from Eclipta prostrata, achieving maximum yield with specific ethanol concentration, time, temperature, and liquid/solid ratio.
March 2022 in “Journal of drug delivery and therapeutics” Sea hibiscus leaf extract at 30% concentration in a hair tonic significantly increased hair growth in guinea pigs.
December 2022 in “Proceeding Bengkulu International Conference on Health” This study concluded that a 5% concentration of celery extract in hair gel provided the best preparation characteristics, including standard parameters for organoleptic properties and spreadability.
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.