Gluten Sensitivity Without Celiac Disease: New Research Findings
Recent research reveals that a significant number of individuals experience gluten or wheat sensitivity despite not having celiac disease. Scientists from the UK and other locations reviewed multiple studies conducted globally, estimating that approximately one in ten people report a condition known as non-celiac gluten/wheat sensitivity (NCGWS). Interestingly, those with NCGWS are also more likely to experience additional health problems, including anxiety and irritable bowel syndrome.
The findings shed light on the fact that “NCGWS is both common and linked to a significant emotional and psychological burden,” according to lead researcher Mohamed Shiha, a gastroenterologist at the University Hospitals of Leicester NHS Trust.
A Systematic Overview
In recent years, several studies have attempted to evaluate the impact of NCGWS. However, Shiha notes that theirs is the first to systematically compile and analyze this data to generate reliable global prevalence figures.
Ultimately, they examined 25 studies conducted from 2014 to 2024 across 16 countries, totaling nearly 50,000 adult participants. They found the global rate of self-reported NCGWS to be 10.3%, albeit with considerable variation among countries. For example, in the UK, the rate jumped to 23%, while in Chile, it was merely 0.3%. In the US, around 5% of respondents indicated they had NCGWS, though this figure is based on just one study.
The most frequently reported symptoms associated with NCGWS were gastrointestinal, including bloating, abdominal pain, and diarrhea. However, some individuals mentioned fatigue, joint pain, and headaches as well. Women appeared more likely to report having NCGWS, which also correlated with higher instances of depression, anxiety, and IBS. Surprisingly, only 40% of individuals with the condition claimed to adhere to a gluten-free diet in response.
The team’s findings were published Tuesday in the journal Gut.
An Inclusive Definition
While celiac disease can be identified through a straightforward blood test, NCGWS lacks standardized diagnostic criteria or reliable markers. The authors emphasize that the condition seems complex, with no singular cause.
“Our findings suggest that NCGWS serves as an umbrella term covering a diverse group of individuals experiencing wheat or gluten-related symptoms, often arising from various underlying factors—ranging from gut-brain interaction disorders like IBS to psychological and social influences,” Shiha explained.
In some instances, increased social awareness and media coverage may play a role in how individuals perceive their symptoms. On the other hand, NCGWS symptoms could sometimes overlap with different health conditions.
“Most instances may not directly relate to gluten or wheat but rather overlap with irritable bowel syndrome and other gut-brain interaction disorders, including functional dyspepsia,” Shiha noted. “The significant correlation we found with IBS, anxiety, and depression lends support to this suggestion.”
Just last week, a review published in the Lancet pointed out that many who claim gluten sensitivity might be more susceptible to fermentable carbohydrates (FODMAPs) or other wheat components. It also proposed that some cases could arise from a nocebo effect, where the expectation of harm from gluten influences symptoms—an idea reinforced by a small clinical trial released in July.
Regardless of the underlying causes, the authors advocate for enhanced diagnosis and treatment of these cases. They are currently working on developing clearer, symptom-based criteria for identifying NCGWS. “We also aim to discover effective management strategies that avoid unnecessary restrictive diets, which could impact quality of life and overall nutrition,” Shiha remarked.
