Cyclic Stability Test of Celery (Apium Graveolens L.) Hair Growth Tonic

This study investigates the cyclic stability of a hair growth tonic made from celery (Apium graveolens L.) leaf extract at concentrations of 4%, 9%, and 14%. The research used a pre-post test experimental design with three 100 ml tonic formulas. The study found no significant changes in physicochemical parameters, such as physical characteristics, active ingredient distribution, pH (3-7), and density (<1 g/ml) over 6 cycles for all formulas. However, the 14% concentration exceeded the viscosity limit (7.7 cPs >5 cPs) by the 3rd cycle. Higher concentrations decreased pH and increased density and viscosity. The 4% and 9% concentrations demonstrated excellent cyclic stability, supporting the development of herbal cosmetics.