What does it really mean when you’re told you have celiac disease?

By Sina Hartung, MMSC-BMI, Harvard Medical SchoolReviewed by Eureka Health Medical Group
Published: July 26, 2025Updated: July 26, 2025

Key Takeaways

Celiac disease is an autoimmune condition in which eating even tiny amounts of gluten (a protein in wheat, barley and rye) prompts your immune system to attack and flatten the villi that line your small intestine. This damage blocks nutrient absorption, causing symptoms from bloating to osteoporosis. The only effective treatment is a lifelong, strictly gluten-free diet verified by repeat antibody tests and, when needed, small-bowel biopsy.

What happens inside your body when you have celiac disease?

In celiac disease, gluten peptides pass through the intestinal lining and trigger an immune cascade that destroys the villi—finger-like projections that absorb vitamins, minerals and calories. Without healthy villi, malnutrition and systemic inflammation follow, even if you eat enough food. “Many patients are surprised that a bread crumb can start this process within hours,” notes the team at Eureka Health.

  • Gluten triggers an autoimmune attackT-cells misidentify gluten as a threat and release cytokines that damage intestinal tissue.
  • Villi flatten and shortenBiopsies show villous atrophy in 95 % of untreated adults, sharply reducing absorption surface area.
  • Nutrients slip through unabsorbedIron, calcium, vitamin D and folate deficiencies appear in over 50 % of new diagnoses.
  • Symptoms extend beyond the gutJoint pain, migraines, infertility and dermatitis herpetiformis stem from systemic inflammation.
  • Family members share the same risk genesAbout 30 % of first-degree relatives carry HLA-DQ2 or HLA-DQ8, the genes required for celiac disease.
  • Nearly 1 % of the population is affectedGlobal studies estimate celiac disease strikes about 1 in 100 people, underscoring how common this immune disorder really is. (ScienceAlert)
  • Untreated celiac elevates osteoporosis and cancer riskStatPearls reports that persistent intestinal inflammation heightens the chances of osteoporosis, anemia and small-bowel malignancies, highlighting the need for lifelong gluten avoidance. (NCBI)

Which signs mean untreated celiac disease is becoming dangerous?

Celiac symptoms vary, but certain patterns suggest active intestinal injury or serious complications. According to Sina Hartung, MMSC-BMI, “Persistent weight loss or severe anemia in a diagnosed patient usually means gluten is sneaking in, or a complication like refractory celiac has developed.”

  • Rapid weight loss greater than 5 % in 3 monthsIndicates ongoing malabsorption and warrants immediate dietary review and blood tests.
  • Recurrent severe abdominal pain with vomitingCould signal small-bowel ulceration or an unrecognized intestinal lymphoma.
  • Iron-deficiency anemia unresponsive to supplementsA ferritin under 15 ng/mL after 3 months of therapy suggests continued villous damage.
  • New onset bone pain or fracturesA DEXA T-score below −2.5 in a young adult hints at long-standing calcium and vitamin D malabsorption.
  • Neurological changes such as numbness or ataxiaGluten ataxia affects up to 6 % of celiac patients and can become irreversible without strict gluten avoidance.
  • Persistent elevation of liver enzymes without another causeUTD notes that liver disease, reflected by chronically raised ALT/AST, can accompany active celiac disease and often resolves once strict gluten avoidance is achieved. (UTD)
  • Night sweats or enlarged lymph nodes suggesting lymphomaThe NHS lists intestinal lymphoma as a rare but serious complication of untreated coeliac disease, so systemic "B" symptoms should prompt urgent assessment. (NHS)

What long-term problems develop when celiac disease is poorly controlled?

Years of unnoticed gluten exposure may lead to irreversible complications outside the gut. The team at Eureka Health explains, “The risk of small-bowel adenocarcinoma is rare overall, but it rises four-fold in patients who remain positive for tTG antibodies over time.”

  • Refractory celiac diseaseAbout 1–2 % of adults develop persistent villous atrophy despite a gluten-free diet and may need immunosuppressive therapy.
  • Osteoporosis and fracturesBy age 50, up to 34 % of untreated patients have osteoporosis confirmed on DEXA scans.
  • Small-bowel cancersEnteropathy-associated T-cell lymphoma peaks 10–20 years after diagnosis if gluten exposure continues.
  • Autoimmune conditions clusterType 1 diabetes, Hashimoto thyroiditis and autoimmune hepatitis occur in up to 20 % of people with long-standing celiac disease.
  • Untreated celiac disease can impair fertilityOngoing mucosal damage has been linked to reduced fertility in both women and men with celiac disease, which often improves after strict gluten avoidance. (CeliacOrg)
  • Poor control during pregnancy raises risk of low-birth-weight infantsContinuing gluten exposure while expecting increases obstetric complications, including delivering babies who are smaller than average for their gestational age. (NHS)

How can you keep gluten completely out of your daily life?

Strict avoidance is challenging but achievable with planning, label reading and ongoing education. “We coach patients to treat kitchen counters the way surgeons treat an operating field—any gluten crumb is contamination,” says Sina Hartung, MMSC-BMI.

  • Circle hidden gluten on labelsBarley malt, modified food starch from wheat and soy sauce are common culprits.
  • Use separate kitchen toolsDedicated toaster slots and colanders prevent cross-contact, the leading source of accidental exposure.
  • Eat whole, single-ingredient foodsFresh fruits, vegetables, meat, fish and plain rice are naturally gluten-free and minimize label confusion.
  • Request a gluten-free meal plan before travelAirlines and hotels may need 48 hours’ notice to prepare safe options.
  • Track symptoms and antibody levels togetherMany patients use digital logs to correlate dietary lapses with spikes in tissue-transglutaminase (tTG) IgA.
  • Trust the regulated “gluten-free” label thresholdFoods that carry a gluten-free label must contain less than 20 ppm of gluten, giving consumers a measurable safety margin when selecting packaged items. (CDF)

Which tests and treatments keep celiac disease under control?

Monitoring involves both laboratory markers and, when needed, medicines for complications. The team at Eureka Health advises, “Repeating tTG IgA six months after diagnosis is the most practical way to confirm you’re healing.”

  • tTG IgA and total IgA every 6–12 monthsA drop of 50 % or normalization predicts mucosal healing in 80 % of patients within a year.
  • Deamidated gliadin peptide (DGP) antibodies in children under 2This test outperforms tTG in toddlers, detecting up to 90 % of cases.
  • Follow-up upper endoscopy for persistent symptomsBiopsy remains the gold standard when antibodies stay elevated or symptoms persist beyond 12 months.
  • Nutrient panels and bone density scansMeasure ferritin, B12, vitamin D and DEXA every 2–3 years to prevent silent deficiencies.
  • Medications for complications onlyBudesonide, azathioprine or biologics may be used under specialist care in refractory or ulcerative cases—there is no pill that replaces a gluten-free diet.
  • Strict gluten-free diet is the cornerstone of controlExcluding wheat, barley and rye for life allows the intestinal lining to heal; products labelled “gluten-free” must contain less than 20 ppm of gluten under UK regulation. (NHS)
  • Dietitian oversight helps catch hidden gluten and maintain nutritionNIH advises partnering with a registered dietitian to scrutinize food, medication and cosmetic labels, ensuring balanced meals and preventing accidental gluten exposure. (NIH)

Frequently Asked Questions

This content is for informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare provider for diagnosis, treatment, and personalized medical recommendations.

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