The effects of xanthan and guar gums on staling of gluten-free rice cakes baked in different ovens International Journal of Food Science and Technology 2010, 45, 87–93 87 Summary of the ‘Effect of gum on staling’ About 3~5% of the population of Europe and USA suffer from celiac diseases which is an autoimmune response to gluten that damages the small intestine. As people from Europe and the USA .....