Development and Assessment of Natural Hair Dye in Various Formulations Using Henna, Hibiscus, Shikakai, Amla, and Indigo: A Review

The review discusses the development and assessment of natural hair dye formulations using plants like henna, hibiscus, shikakai, amla, and indigo. These plants contain bioactive compounds that provide natural coloring and hair conditioning benefits, offering a safer and eco-friendly alternative to synthetic dyes, which often cause scalp irritation and allergic reactions. The study highlights the favorable sensory characteristics and standard physicochemical properties of these herbal dyes, suggesting their potential as sustainable alternatives to minimize adverse effects associated with chemical hair colorants.