December 2025 in “Sustainable Chemistry One World” In this study, researchers found that mangosteen pericarp extract, combined with FeSO₄ as a mordant, effectively produced a stable reddish hair dye on bleached hair, with good color persistence and enhanced tensile strength, indicating its potential as an eco-friendly and safer alternative to synthetic dyes.
1 citations
,
April 2019 in “PubMed” In this study, researchers found that papain-treated or mechanically altered Asian scalp hair fibers allowed for spontaneous ion movement and anthocyanin dye flow through the medulla tube, with dye flow enhanced by applied DC voltage.
December 2017 in “JURNAL FARMANESIA” In this study, the researchers found that using dragon fruit peel extract in a gray hair dye formulation, along with specific adjuvants, produced a dark black color on gray hair, demonstrating its potential as a natural colorant alternative to synthetic dyes.
November 2024 in “Majalah Farmasetika” In this study, the researchers explored a hair dye gel formulated with Indonesian native plant extracts and found it produced stable brown shades on bleached hair, with the most preferred dark brown achieved at a 12% concentration, and showed no skin irritation.
January 2025 in “Journal of Pharmacognosy and Phytochemistry” This study developed plant-pigment-based shampoos using extracts from Neem, Fenugreek, Hibiscus, and Butterfly Pea, which demonstrated stability, antimicrobial properties, and potential scalp benefits such as hair growth promotion and dandruff reduction, making them a promising alternative to synthetic dyes.