Beta (β)-glucan as Microbial Polymer with Nutraceutical Potential

This book chapter reviews microbial beta-glucans as possible nutraceutical ingredients. It discusses their chemistry, biosynthesis, extraction, identification, and industrial production, and summarizes literature on immune, metabolic, and antioxidant effects. The authors note that biological activity varies with source, linkage pattern, molecular weight, conformation, solubility, and processing. They also identify limited availability and extraction difficulties as barriers to wider use. Because this is a narrative chapter rather than a new clinical experiment, the described health effects depend on the quality and relevance of the studies it cites and should not be read as evidence for any specific product.