Rice itself is naturally gluten free. However, some pudding rice packs have a 'may contain' warning for wheat, making them unsuitable for people with coeliac disease or on a gluten free diet. Always double check the labels as some recipes may change and allergy warnings like this are often added and taken away! At the time of writing, the Sainsbury's pudding rice has a may contain warning for wheat. The Asda, M&S and Tesco ones do not.