A complex carbohydrate comprising hundreds to thousands of chemically bonded D-Glucose units it is the principal structural component of the cell walls of plants. Cellulose is one of the main components of Fibre and cannot be digested by enzymes in the gut. Instead, it is digested by microbes housed in the large intestine and yields Volatile Fatty Acids which are absorbed and utilized to produce energy. An example of pure cellulose is cotton wool and it is thought to be the most abundant of all organic compounds.
