yes, I have heard of this. You have to be very careuful when the ingredient label says "Natural flavoring" , ""Caramel coloring" "modified food starch"-(although in the US it has to be made from corn). These are referred to as "hidden glutens" and processed foods are full of them. Many health food stores have gluten free product guides available to assist you with oyour shopping. There is also a national product guide available through the CS/USA website. They cost $20 or soemthing, but they are incredibly worth it. Also, your local support group may also have some resources available. happy hunting!