How Does Gluten Appear on Labels? - Health Yeah Life Look for wheat, modified starch, dextrose, dextrin, dextri-maltose, and caramel coloring on your medications. The source of the ingredients, apart from wheat ingredients, can be gluten-free. For example, corn or potato are two other ingredients that can make dextrin. And, dextrin from these sources is safe for gluten-free dieters.