Is Gluten Making You Sick?
Bloating, fatigue, brain fog, joint pain, skin problems, headaches – and they all seem to improve when you avoid bread and pasta. You have been tested for coeliac disease and it came back negative. So does that mean gluten is not your problem? Not necessarily.
At our practice in Zürich Seefeld, I recognise that gluten-related disorders exist on a spectrum – from coeliac disease to non-coeliac gluten sensitivity – and that dismissing patients’ symptoms simply because their coeliac test is negative does them a disservice.
The Gluten Spectrum
Coeliac disease: An autoimmune condition affecting approximately 1% of the population (though many are undiagnosed). Gluten triggers an immune attack on the small intestinal lining, causing villous atrophy, malabsorption, and a wide range of symptoms. Diagnosed through tissue transglutaminase (tTG) antibodies and confirmed by duodenal biopsy. Requires lifelong strict gluten avoidance.
Non-Coeliac Gluten Sensitivity (NCGS): A recognised clinical entity where patients experience symptoms upon gluten ingestion that resolve with withdrawal, in the absence of coeliac disease or wheat allergy. The mechanisms are not fully understood but may involve innate immune activation, gut barrier dysfunction, and effects on the gut microbiome.
Wheat allergy: An IgE-mediated allergic reaction to wheat proteins (not only gluten). Usually causes rapid-onset symptoms and is diagnosed through specific IgE testing or skin prick testing.
Symptoms Beyond the Gut
While digestive symptoms (bloating, diarrhoea, constipation, pain) are common, gluten-related conditions frequently cause extra-intestinal symptoms: fatigue, brain fog and difficulty concentrating, headaches and migraines, joint and muscle pain, skin conditions (dermatitis herpetiformis in coeliac, various rashes in NCGS), mood disturbances (anxiety, depression), anaemia, numbness or tingling, and in coeliac disease, potential effects on fertility and bone health.
Why Proper Testing Matters
Before going gluten-free, it is essential to be properly tested for coeliac disease – because once you remove gluten, the antibodies normalise and the test becomes unreliable. I check tTG-IgA antibodies, total IgA (to rule out IgA deficiency, which causes false negatives), and anti-deamidated gliadin peptide (DGP) antibodies. If coeliac is confirmed, duodenal biopsy is the gold standard. You must be consuming gluten regularly for at least 6 weeks before testing for accurate results.
Our Approach to Gluten Sensitivity
If coeliac disease is excluded, I investigate further: assessing gut permeability, microbiome health, and conducting a structured gluten elimination and challenge protocol. I also consider whether FODMAPs (fructans in wheat) rather than gluten itself might be the trigger, as this distinction changes management significantly.
What We Do: Clarity and a Clear Path Forward
Definitive coeliac testing: Before any dietary changes, ensuring proper testing is done.
Structured elimination protocol: A rigorous gluten-free trial (minimum 4-6 weeks) with blinded reintroduction to objectively assess sensitivity.
FODMAP differentiation: Determining whether gluten or fructans (or both) are the issue, which guides dietary management.
Gut healing: For confirmed sensitivity, supporting gut barrier repair with L-glutamine, zinc carnosine, and anti-inflammatory nutrients.
Nutrient monitoring: Checking for and correcting deficiencies common in both coeliac disease and NCGS – iron, B12, folate, vitamin D, calcium, and zinc.
Ongoing support: Practical dietary guidance for maintaining a gluten-free or gluten-reduced diet without unnecessary restriction.
Conclusion
Gluten-related disorders are real and extend beyond coeliac disease. If you suspect gluten is affecting your health, proper testing and a structured approach are essential – both to avoid unnecessary restriction and to ensure genuine conditions are not missed. Book a consultation at our practice in Zürich Seefeld for clarity.
