NANO-ENCAPSULATION OF AGRO-WASTE DERIVED PIGMENTS FROM BANANA AND ONION PEELS FOR ENHANCED STABILITY IN HERBAL HAIR DYE APPLICATIONS: A REVIEW

People now prefer natural, sustainable hair dye options because they understand how synthetic hair dyes damage their hair. The bioactive pigments found in banana and onion peel agro-waste materials contain natural colouring and antioxidant properties, owing to phenolics, flavonoids, carotenoids, and anthocyanins. Herbal hair dyes experience restricted usage because their products prevent stable colour retention while failing to achieve proper hair fibre absorption. Nano-encapsulation technology provides an optimal solution through its ability to protect pigments by using nanoscale carriers, which maintain their stability during controlled release. The study shows how researchers extract pigments from banana and onion peels and develop their nano-encapsulation techniques to enhance the efficiency of herbal hair dye systems. The research demonstrates how nano-formulated agro-waste pigments function as environmentally friendly, safe, and effective substitutes for synthetic dyes.