I spoke to the manufacturer of Natural Gold and found out the potato starch is used as a bonding agent but is also digestible. Yesterday I had stated that it wasn't. Raw potato starch is not digestible, however, the starch used in Natural Gold goes through a process that basically "cooks" it, therefore it is digestible. When I originally spoke to the manufacturer, it was not clear that the discussion referred to cooked or uncooked starch. I apologize for the confusion. Connie [Posted in FML issue 4448]