Abstract: The desmutagenic substances consist of a fibrous constituent of food which was produced from corn fibers. These substances have a function of inactivating mutagens which occur in our daily life environment, for example, dinitropyrene, pyrolysate mutagens of food or the like. The process for producing these substances comprises the step of subjecting corn fibers to a treatment process to remove starch, protein and other digestable substances therefrom, the treatment process being an enzyme treatment, chemical treatment or physical treatment or a combination thereof.

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.

Abstract: Anti-mutagenic factor is fractionated from cabbage juice. The factor is a protein having an M. W. of about 48,000 when determined by the SDS-gel electrophoresis and shows characteristic adsorptions at 280 nm and 404 nm. The factor substantially inhibits the mutagenic activity of various mutagens such as pyrolysates of amino acids.