what test is there to determine the level of oxalate in our system – blood? urine? i was just put on a low oxalate diet, low sodium, but am finding various conflicting lists of "low oxalate" foods. My urologist gave me a UPMC (university of philadelphia) low oxalate list..wheat is a definite no, but on another page, it lists graham crackers as ok… wheat is in graham crackers. it's just confusing.