Beta 1,3-1,6 D-Glucan

Beta-1,3/1,6-D-glucan is a complex polysaccharide derived from the cell walls of Saccharomyces cerevisiae yeast and medicinal mushrooms, recognised as one of the most potent natural immunomodulators in over 1,000 peer-reviewed publications. Its primary mechanism involves binding to the Dectin-1 receptor and complement receptor 3 (CR3/Mac-1) on macrophages, dendritic cells, and neutrophils — initiating a transcriptional programme that primes innate immune readiness without causing overt inflammation, a phenomenon termed 'trained immunity.' Primed macrophages exhibit enhanced phagocytic capacity, increased reactive oxygen species production against pathogens, and elevated cytokine secretion in response to subsequent infectious challenge. Clinical trials confirm beta-glucan supplementation reduces upper respiratory infection frequency and duration, particularly in high-stress populations.