Cellulose is a natural polysaccharide with its primary component being the cell walls of green plants and algae. Commercially it can be prepared from wood and cotton. It produces a crystalline powder that is used as an anti-caking agent, emulsifier, thickener, and as a source of dietary fibre.http://www.creative-enzymes.com/product/Cellulose-i-Microcrystalline-Cellulose-ii-Powdered-Cellulose_424.html