Over the past 2 years my husband has had a rash, which failed to be treated by the dozens of creams numerous specialists prescribed.  Recently, when it reoccurred again, we thought to look at the label of the cheese and onion flavoured chips he had eaten the day before.  Sure enough 635!  We then looked at the foods he commonly eats, and sure enough 635.  As a Dietitian I didn't even think of this until checking out your website. Thanks for your hard work over the years with food intolerance.  It is certainly much appreciated by many clients who have benefited in my practice as a Dietitian - Frances from SA.