I'm at Liverpool University <a href=" http://www.lczhi.com/omeprazole-price-comparison.pptx ">prilosec omeprazole wiki</a> GREEN: This standard means that all food products should have no more than 20 parts per million if they're going to claim to be gluten-free. Now, it is a voluntary standard, and we actually go to the trouble of finding out if companies actually measure the amount of gluten because it should be within these guidelines to be labeled as gluten-free.