Effect of Sodium Lauryl Sulfate Concentration Variation as Surfactant in Ethanol Extract Shampoo of Randu Leaves (Ceiba Pentandra Gaertn) on the Resulting Physical Properties

This study found that varying the concentration of propylene glycol in katuk leaf extract hair tonic formulations significantly affects the viscosity, highlighting the importance of propylene glycol concentration in maintaining the physical characteristics of these preparations.

In an experimental study, researchers evaluated shampoo formulations using celery leaf extract (Apium graveolens L) for hair growth and found that a 2% extract concentration provided the most favorable physical and chemical properties compared to other formulations.

This study found no difference in the physical stability of hair tonic preparations made from sansevieria leaves extract, regardless of whether maceration or soxhletation methods were used.

This study in South Sulawesi Province developed a shampoo using ethanol extract from Pondoh salak fruit peel, which met physical stability tests and demonstrated strong inhibitory effects against Staphylococcus epidermidis and Candida albicans, with formulations ranging from 10% to 20% concentrations.

This study found that variations in propylene glycol concentration in wax apple leaf extract hair tonic affected pH, specific gravity, and viscosity, aligning with SNI requirements.