If IP6(Rice Bran) also chelates zinc and calcium wouldnt it be best to stay away from it. I have been using rice bran as a prebiotic but have been very concerned about the phytic acid in th bran. Are there other reliable sources of prebiotics other than brans?
Phytic acid has a much higher affinity for heavy metals and iron than it does for calcium or zinc. Also keep in mind that in order to bind the heavy metals or iron it must give up the compounds it is bound to and has less of an affinity for such as the calcium and zinc.