Beneficial effect of dietary fiber and other luminacoids on mineral bioavailability

Dietary fiber would decrease mineral bioavailability because it may have cation exchange capacity, bind mineral ion and form complexes difficult to absorb in intestinal lumen, as phytin does. But in actually, many dietary fibers have already appeared to be a good source of minerals especially in mineral deficiency, even if some dietary fibers contained considerable amount of phytin. Moreover, some dietary fibers and other luminacoids, proposing term as dietary components which are not digested and/or absorbed in the human small intestine and which exert physiological effect that are useful in maintaining good health via gastrointestinal tract, appeared to improve mineral bioavailability.