Herbal Bulk 454gm by Seroyal - GenestraHerbal Bulk provides psyllium husks along with other natural water soluble fibers and synergistic nutrients required for proper elimination of putrefactive materials from the colon and the gastrointestinal tract. Inflammatory bowel diseases are due to a number of factors, including stress, genetic predisposition, bacterial, parasitic and viral infections, a diet high in refined sugar and allergenic foods, such as corn and peanuts, and low fiber diets.