Celiac.com 03/23/2015 - There's been a bit of ping-ponging going on about the status of non-celiac gluten sensitivity as a valid medical condition. Studies have yielded conflicting results, with some supporting, and others negating, the existence of non-celiac gluten-sensitivity.
So what's the deal? Does non-celiac gluten sensitivity exist, or not? Researchers and clinicians continue to debate whether people without celiac disease or wheat allergy who consume gluten can experience intestinal and extra-intestinal symptoms attributable to non-celiac gluten sensitivity (NCGS).
For their study, the team enrolled 61 adults without celiac disease or wheat allergy, but who believe that eating gluten-containing food to be causing of their intestinal and extra-intestinal symptoms. The team randomly assigned participants to groups that received either 4.375 g/day gluten or rice starch (placebo) for 1 week, each via gastro-soluble capsules. Study subjects spend one week on a gluten-free diet, and then switched groups.
The primary outcome was the change in overall (intestinal and extra-intestinal) symptoms, determined by established scoring systems, between gluten and placebo intake. A secondary outcome was the change in individual symptom scores between gluten vs placebo.
Per-protocol analysis of data from the 59 patients who completed the trial shows that intake of gluten significantly increased overall symptoms compared with placebo (P=.034). Among the intestinal symptoms, abdominal bloating (P=.040) and pain (P=.047) were significantly more severe when subjects received gluten than placebo. Among the extra-intestinal symptoms, foggy mind (P=.019), depression (P=.020), and aphthous stomatitis (P=.025) were also worse when subjects received gluten than placebo.
In this cross-over trial, subjects with suspected NCGS saw significantly more severe symptoms during 1 week of intake of small amounts of gluten, compared with placebo. So, at least for now, the NGCS ball seems to be back in the court that considers it a valid medical condition.