components of yeast and fungal cell walls that exhibit antibacterial, antiviral and antitumor actions.

Small pieces of the cell walls of molds which may cause inflammatory lung and airway reactions. These glucans can affect the immune system when inhaled. Exposure to very high levels of glucans or dust mixtures including glucans may cause a flu-like illness known as Organic Dust Toxic Syndrome (ODTS). This illness has beeen primarily noted in agricultural and manufacturing settings. (EPA, 2001)

Polysaccharides with immune stimulating abilities; found on the cell walls of yeast, oat, barley and other plants.