However, the bioavailability of soymilk calcium, both endogenous and fortified, is limited by phytic acid (inositol hexaphosphate) naturally present in soybeans which strongly chelates divalent cations . The bulk of phytic acid is found in the cotyledons. The cotyledons contain as much as 1.6% phytic acid, which is localized in the protein bodies and appears to be distributed between soluble protein–phytate salts and insoluble globoid inclusions . The release of phytic acid resulting from the disintegration of cotyledons in soymilk production renders the chelator more active, which furhter reduces the bioavailability of calcium