The husk of Psyllium is the actual coating of mucilage around the seed. It is considered pure dietary fiber and is the only part of the plant used in manufacturing Psyllium products. Its nutritional value consists mainly of glycosides, proteins, polysaccharides, vitamin B1, and choline. The seed itself is made up of 40% Linoleic Acid (LA), an important fatty acid essential to health. The husk is composed mostly of a fiber called hemicellulose which is a complex carbohydrate found in whole grains, fruits and vegetables. Hemicellulose is undigestible... it is partially broken down in the colon and feeds the friendly intestinal flora.