May 2023 in “Jurnal farmasi sains dan praktis” In this research on cinnamon and virgin coconut oil hair tonics, F2 and F3 demonstrated stable physical properties and mild irritation potential, while formula 1 remained non-irritating but less stable regarding pH and viscosity.
December 2025 in “JURNAL PIJAR MIPA” This study found that a natural hair tonic spray formulated from 15% water pumpkin fruit extract promoted rabbit hair growth to a degree comparable to a synthetic control.
January 2026 in “Journal of Innovative and Creativity (Joecy)” This study investigated hair growth tonics made with celery leaf extract and found that 4% and 9% concentrations maintained better cyclic stability than 14%, supporting their potential use in herbal cosmetic development due to favorable physicochemical stability.
April 2025 in “Jurnal Multidisiplin Dehasen (MUDE)” In this study, a hair tonic containing fragrant pandan leaf extract and virgin coconut oil was formulated and evaluated, with most variations demonstrating physical stability except for one formulation, which showed instability in the specific gravity test.
This study suggests that a candlenut oil nanoemulsion formulation could enhance hair growth activity in Sprague Dawley rats, with stability for up to 14 days at room temperature.