Preparation and Evaluation of One-Stage and Two-Stage Polyherbal Hair Dye Formulations

The study explores the development and evaluation of 13 polyherbal hair dye formulations using plant-based ingredients like henna, beetroot, and indigo as sustainable alternatives to synthetic dyes. It highlights the benefits of herbal dyes, such as the absence of harmful chemicals and the potential for color variations through different combinations and application methods. Two-stage applications, particularly those containing henna, produced darker colors. The formulations also offer a synergistic effect of tannins, carotenoids, and flavonoids, which enhance coloring and provide protective benefits for hair and skin.