Beta-1,3-glucans (from curdlan)

Beta-1,3-glucans are large polysaccharides that can be derived from the cell walls of algae, bacteria, fungi, yeast and plants. They are considered a form of soluble fiber that are indigestible by human intestinal enzymes 1.

Curdlan is a specific beta-1,3-glucan derived from the nonpathogenic bacterium, Alcaligenes faecalis. It is approved for use as a food additive by the U.S. Food and Drug Administration (FDA) 2.


  1. Natural Standard Database. 2009.
  2. Food and Drug Administration. EAFUS: A Food Additive Database. 10-17-2008. 12-4-2008.