If antacids aren’t working, an undiagnosed autoimmune condition may be the real reason your digestion is failing.
KEY STATISTICS
- Celiac disease affects approximately 1 in 100 people worldwide, yet up to 80% remain undiagnosed, according to the World Health Organization.
- Research published in the World Journal of Gastroenterology found that low stomach acid (hypochlorhydria) is significantly more common in people with untreated celiac disease than in the general population.
- The average delay between symptom onset and a celiac diagnosis is still 6 to 10 years in many countries, according to the National Institutes of Health.
You have been taking antacids for months, maybe years, because your stomach feels like a battlefield after every meal. But what if the acid isn’t the problem — what if your body is actually producing too little of it? An undiagnosed autoimmune condition called celiac disease may be quietly dismantling your digestive system from the inside out.
What Celiac Does Inside
Celiac disease is an autoimmune condition triggered by gluten, a protein found in wheat, barley, and rye. When someone with celiac eats gluten, the immune system attacks the lining of the small intestine, causing damage to the tiny finger-like projections called villi.
Those villi are responsible for absorbing nutrients — including the ones your body needs to produce adequate stomach acid. Over time, this damage disrupts the production of gastric acid, leading to a state called hypochlorhydria, or chronically low stomach acid.
Low stomach acid creates a cascade of problems. Without enough acid, food sits and ferments in the stomach, producing gas, bloating, and a burning sensation that feels exactly like too much acid — which is why so many people reach for antacids or proton pump inhibitors.
Suppressing acid further only masks the symptom. The autoimmune trigger — gluten — continues causing intestinal damage, and the nutrient deficiencies that follow deepen over time.
Why Midlife Adults Miss This
Adults between 35 and 45 are in a particularly vulnerable window. Celiac disease can emerge or worsen at any age, and midlife hormonal shifts, accumulated stress, and gut microbiome changes can all act as triggers that unmask a previously silent condition.
Many people in this age group have spent years managing vague digestive complaints — bloating, reflux, irregular bowel habits — without ever connecting them to a systemic autoimmune process. By midlife, the cumulative intestinal damage can become significant.
Nutrient absorption also naturally becomes less efficient after 35. When celiac-driven intestinal damage compounds that decline, deficiencies in iron, B12, magnesium, and vitamin D can develop quickly — and those deficiencies affect energy, cognition, bone density, and immune function simultaneously.
Warning Signs to Watch For
- Persistent bloating or gas that worsens after eating bread, pasta, or cereals
- A burning or heavy sensation in the stomach that antacids only partially relieve
- Unexplained iron-deficiency anaemia or persistently low B12 levels despite dietary intake
- Chronic fatigue, brain fog, or low mood that does not improve with rest
- Skin rashes, joint pain, or mouth ulcers that appear alongside digestive symptoms
What Actually Helps
The most important step is stopping the guesswork with antacids and pursuing proper testing. Blood tests for specific antibodies — including tTG-IgA — are the standard first step for diagnosing celiac disease, and they require you to still be eating gluten at the time of testing.
If celiac disease is confirmed, a strict gluten-free diet is the only evidence-based treatment. Within weeks to months of removing gluten, the intestinal lining begins to heal, and stomach acid production may gradually normalise.
During the healing phase, nutritional rehabilitation is critical. Working with a dietitian familiar with celiac disease ensures you address the specific deficiencies that commonly accompany it — particularly iron, folate, B12, vitamin D, and magnesium.
Avoid self-treating with digestive enzyme supplements or betaine HCl before a diagnosis is confirmed. These can be helpful tools under guidance during recovery, but they do not address the underlying autoimmune damage.
Action Plan Checklist
- Do not stop eating gluten before testing — accurate celiac blood tests require gluten still in your diet
- Ask your doctor for a tTG-IgA antibody panel and, if positive, a referral for endoscopy to confirm diagnosis
- Request a full nutritional blood panel including iron, ferritin, B12, folate, vitamin D, and magnesium
- If diagnosed, work with a registered dietitian specialising in celiac disease to plan your gluten-free transition safely
- Track symptoms in a food and symptom journal for two to four weeks before your appointment — patterns help your doctor significantly
The Overlooked Presentation Problem
One factor that delays diagnosis for adults in this age group is the assumption that celiac disease always causes dramatic weight loss or diarrhoea. In midlife adults, the presentation is often far subtler — fatigue, mood changes, skin issues, or joint pain dominate, while digestive symptoms remain mild or intermittent.
This non-classical presentation is increasingly recognised in medical literature and is referred to as silent or atypical celiac disease. It is especially common in adults who were not diagnosed in childhood.
Stress also plays an important compounding role. Chronic psychological stress alters gut permeability and immune regulation, which can worsen autoimmune activity and deepen the cycle of acid dysregulation. Managing stress through consistent sleep, regular movement, and mindfulness practices supports gut healing alongside dietary changes — but these are supportive measures, not substitutes for medical diagnosis and treatment.
Bottom Line
Chronic digestive discomfort in midlife is not something to manage indefinitely with over-the-counter acid relief. If your symptoms are persistent, unexplained, or accompanied by fatigue and nutrient deficiencies, asking your doctor to rule out celiac disease is a straightforward and potentially life-changing step. Healing the root cause — not suppressing the symptom — is what your gut actually needs.
Always consult a qualified healthcare provider before making changes to your health routine.
Sources
- Celiac Disease: Diagnosis, Pathogenesis and Treatment — World Journal of Gastroenterology
- Celiac Disease Facts and Figures — National Institutes of Health — National Institute of Diabetes and Digestive and Kidney Diseases
- Hypochlorhydria and Nutrient Malabsorption in Autoimmune Gastrointestinal Conditions — American Journal of Gastroenterology
- Celiac Disease Overview: Diagnosis and Management in Adults — Mayo Clinic
- Atypical and Silent Celiac Disease in Adult Populations — BMJ Open Gastroenterology
