 In addition to gluten withdrawal, some people need to follow a low-FODMAPs diet or avoid consumption of commercial gluten-free products, which are usually rich in preservatives and additives (such as sulfites, glutamates, nitrates and benzoates) and might have a role in triggering functional gastrointestinal symptoms.There is debate as to the benefits of screening.As of 2017, the United States Preventive Services Task Force found insufficient evidence to make a recommendation among those without symptoms.