Cellulose nanocrystals are widely used in the production of lightweight, high-strength composite materials, making them ideal for automotive and aerospace industries. They enhance the mechanical properties of polymers, improving durability and performance. In the food industry, they serve as stabilizers and thickeners, providing texture and consistency to products like sauces and dressings. Their biocompatibility makes them suitable for biomedical applications, including drug delivery systems and wound dressings. Additionally, they are used in the development of transparent, flexible films for packaging, offering an eco-friendly alternative to traditional plastics. Their high surface area and reactivity also make them valuable in water purification systems for removing contaminants.