<<Disclaimer: Verify this information before applying it to your situation.>> Jennifer Petersen has just posted a long summary of adding fiber to one's diet. Many of the excerpted responses recommended adding bran to one's diet. If one is concerned about absorbing minerals, then this is the worst food one can eat. Bran (and whole grains containing bran) contain phytic acid which strongly binds to minerals like calcium, iron, zinc and magnesium to form insoluble salts, phytates, which then precipitate from the body. This would affect the minerals consumed in the same meal as bran. If one cares about these minerals, and celiacs should, then one should not be eating bran. I have 60 references on this. This article by Staffan Lindeberg uses 29 of them as footnotes: http://maelstrom.stjohns.edu/CGI/wa.exe?A2=ind9706&L=paleodiet&P=850 Don.