Red Algae Phycocolloids: Functional Properties and Emerging Applications

Abstract

Phycocolloids obtained from red seaweeds, such as agar, carrageenan, and other sulphated polysaccharides, are increasingly valued for their diverse functionalities and broad industrial relevance. These ocean-derived biopolymers possess distinctive molecular structures and biological activities, making them suitable for applications across the food industry, medicine, cosmetics, and biomedical fields. This review provides a comprehensive synthesis of current knowledge on red algae phycocolloids, beginning with their biological origin, biosynthetic pathways, and ecological roles. It highlights recent advances in extraction and purification technologies, with a focus on improving yield, safety, and environmental sustainability. The review also explores emerging applications in drug delivery, tissue engineering, and green technologies, underscoring their potential in sustainable innovation. Key challenges, including regulatory constraints, scalability, and the need for interdisciplinary collaboration, are discussed, along with future directions for research and industrial development. This work aims to support the strategic integration of red algae phycocolloids into next-generation biotechnological solutions.