Abstract: A method for producing a product capable of adsorbing mutagen involving providing a fiber-rich, vegetable material capable of adsorbing mutagen by separating fibers from a vegetable, boiling the fibers and then washing and dewatering the fibers, prior to treating the fibers to produce dehydrated, fiber-rich vegetable material in particulate form by subjecting the fiber-rich material to a dehydration technique which preferably involves co-drying the fibers with carrier materials, and an ingestible product including fiber-rich vegetable material made from cabbage, radish, bamboo sprout, onion, carrot, pimiento, spinach, soybean malt, and asparagus.