Beta (β)-glucan as Microbial Polymer with Nutraceutical Potential
Summary Nutraceuticals provide significant potential in enhancing health and mitigating ailments, rendering them a vital inclusion in the contemporary healthcare domain. Nutraceutical polymers derived from microbes including bacteria, fungi, and microβalgae are one of the versatile and sustainable bioactive compounds with promising healthcare benefits. β-glucan is one of the microbial polymer nutraceuticals belongs to polysaccharides and possesses several advantageous health features, including the ability to prevent and treat specific digestive ailments and enhance the immune system. The biological activity of this chemical is influenced by factors such as its size, molecular weight, conformation, bond frequency, solubility, and structural modifications. β-glucan lowers cholesterol and glucose levels in the bloodstream, hence decreasing the likelihood of developing cardiovascular disease and diabetes. β-glucan not only affects lipid levels and glucose metabolism, but it also has antioxidant capabilities by eliminating reactive oxygen species. This reduces the risk of several illnesses such as atherosclerosis, cardiovascular diseases, neurodegenerative disorders, diabetes, and cancer. However, the widespread use of these polymer nutraceuticals is limited due to limits in their availability and difficulties in extracting them from these microorganisms. This chapter emphasizes the importance of β-glucan as powerful agent for a diverse array of nutraceuticals and their potential in mitigating numerous health problems. The chapter discusses the chemistry, biosynthesis, extraction, and identification of these polymers together with exploring their potential to be used in nutraceuticals and therapeutic applications.
ReferencesChemistry, Biosynthesis, Extraction, Identification, and Industrial Production of Bi
This 2025 chapter published in Microbial Nutraceuticals (Wiley) reviews the role of beta-(β)-glucans as microbially-derived polysaccharides with substantial nutraceutical potential. Nutraceuticals — food-derived compounds providing health benefits beyond basic nutrition — represent a vital area of contemporary healthcare, and microbially-produced beta-glucans are among the most studied candidates in this space.
The chapter examines beta-glucans derived from diverse microbial sources including bacteria, yeasts, and fungi, with particular emphasis on structural diversity. The backbone linkage pattern (primarily beta-1,3 with beta-1,6 branches) and molecular weight distribution significantly influence biological activity. Aureobasidium pullulans is highlighted as a notable fungal source producing high-molecular-weight beta-1,3-1,6-glucans with strong bioactivity profiles.
The review covers the immunomodulatory, anti-inflammatory, antioxidant, antitumor, and prebiotic properties of microbial beta-glucans documented in the literature. These multifaceted bioactivities position beta-glucans as versatile nutraceutical ingredients applicable across multiple health domains including immune support, cancer adjunct therapy, cardiovascular health, and gut microbiome modulation.
The authors conclude that microbially-derived beta-glucans hold significant promise as functional food ingredients and nutraceutical supplements. Their GRAS (Generally Recognized As Safe) status, scalable microbial production, and well-documented health benefits make them strong candidates for integration into mainstream healthcare and functional food formulations.
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Prabhakar P., Verma D., Banerjee M.. Beta (β)-glucan as Microbial Polymer with Nutraceutical Potential. Microbial Nutraceuticals. 2025. DOI: 10.1002/9781394241538.ch11.
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