His bone marrow is working fine as his white blood count is completely normal, so does not appear to be anemia due to bone marrow suppression from anemia. His iron levels were quite low and didn't improve with aggressive oral replacement (3 iron capsules AND three liver tablets with vitamin C daily) and his blood count improved only slightly with iron infusions only to start to fall again after they were done ( he's had a total of 15 iron infusions). The one grossly bloody stool he had suggests GI blood loss but his colonoscopy and upper GI endoscopy showed nothing but a couple of blood vessels that weren't bleeding but were cauterize anyway. PET scan didn't suggest and tumor inbthe abdomen.