Starch functionality in cosmetics and personal care products

Innovative and sustainable ingredients are increasingly sought after for environmentally responsible beauty products in the cosmetic industry. Despite extensive research into its industrial uses, and its pivotal role in enhancing product properties, starch remains an underrecognized ingredient in cosmetics. This study examines the properties, applications, and advancements of starch, a versatile biopolymer, evaluating its potential as a sustainable and adaptable component in cosmetic formulations. Starch offers desirable qualities such as absorbency, smooth texture, and ease of application, benefiting a wide range of cosmetic products, including skincare, body care, haircare, and makeup. While native starch can be used directly in cosmetics, some formulation requirements necessitate modifying its inherent qualities. This is achieved through various chemical, physical, and enzymatic treatments, to enhance starch's functionality. This review explores starch sources like corn, potatoes, and tapioca, and how their distinct qualities affect formulation performance. The findings highlight starch's potential as a sustainable alternative to synthetic polymers, offering eco-friendly benefits without compromising product performance. However, challenges persist regarding stability, compatibility, and balancing starch's beneficial properties with its limitations when combined with other ingredients. By bridging these gaps through research and increasing awareness, starch is a potential key component in sustainable, high-performance cosmetic formulations.