For some, it's a fad. For others, it's a necessity. Whatever the reason, eating gluten-free is big.
About 30 percent of American adults are trying to reduce or eliminate gluten from their diets, research firm NPD found in 2013. And they're searching for gluten-free items on restaurant menus, the same study found: the frequency of customers ordering gluten-free food had doubled since 2009. Offering a gluten-free menu in your restaurant can be a lucrative decision, but also challenging to execute.