I have been gluten free due to celiac disease for more than 11 years. If this is suspected to be the cause of your daughter's medical problem, it is important NOT to start a gluten free diet without being evaluated by a gastro specialist. Gluten is found in wheat, rye, barley and most oats. There are gluten free oats available, the issue with oats is cross contamination as they are usually processed on the same equipment as wheat. Many, many processed foods contain wheat. I will be glad to help you - feel free to PM me.