Barbara Sheppard <[log in to unmask]> > >PHYTIC ACID is a well-known ligand, present in cereals, which form insoluble > >complexes with metals such as Zn. > on, but that the hulls also contain phytic acid, which is problematic. (I > have read that phytic acid interferes with calcium absorption, but did not > know about the zinc.) Phytic acid interferes with a bunch of minerals. Also iron and I think magnesium (don't have Windows running so can't get to my files). Steffan Lindeberg has posts on this in the PaleoDiet archives. Don.