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.
7 citations
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January 2019 in “Journal of Pharmacy And Bioallied Sciences” This study identified the major component of katuk leaf water extract as an alkaloid compound with a molecular mass of 406.3131 m/z, named (S, S)-5,5′-amino-4,4′-dihexyl-propyldihydropyrazol-3,3′-one.
January 2026 in “International Journal of Health Engineering and Technology” In this study, researchers evaluated the effects of green spinach leaf extract on hair growth in New Zealand rabbits and found that the 15% concentration formula resulted in the highest average hair growth compared to other concentrations and controls.
11 citations
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July 2020 in “International Journal of Ayurvedic Medicine” This study identified 26 bioactive compounds in the ethanol extract of Indigofera tinctoria leaves, which are linked to various therapeutic activities, supporting its traditional medicinal use in treating numerous health conditions.
July 2025 in “JURNAL BIOLOGI TROPIS” In this animal study, the researchers reported that a shampoo containing 2.5% teak leaf extract and 0.30% virgin coconut oil significantly increased hair growth rate and reduced hair loss in mice, suggesting potential benefits for addressing hair loss.