β-Glucans from Yeast—Immunomodulators from Novel Waste Resources

β-glucans are a large class of complex polysaccharides with bioactive properties, including immune modulation. Natural sources these compounds include yeast, oats, barley, mushrooms, and algae. Yeast is abundant in various processes, fermentation, they often discarded as waste products. The production biomolecules from resources growing trend worldwide novel being constantly identified. Yeast-derived may assist the host’s defence against infections by influencing neutrophil macrophage inflammatory antibacterial activities. were long regarded an essential anti-cancer therapy licensed Japan immune-adjuvant for cancer 1980 new mechanisms action molecules emerging. This paper outlines yeast β-glucans’ immune-modulatory effects, extraction, their availability streams.