Coeliac Myths, Debunked: 12 Things People Get Wrong

Coeliac myths spread fast — and some of them are genuinely risky. We’ve turned each of the twelve most common ones into its own plain-English answer, so you can read (and share) exactly the one you need. Tap any myth below for the full explanation, the science, and what to actually do.

Each answer is grounded in Coeliac UK, NICE NG20, the Codex ≤20 ppm standard and AOECS — never hype, never fear.

Condition myths

• “Coeliac disease is just a food allergy.”
  Coeliac disease is a lifelong autoimmune condition, not an allergy — gluten drives the immune system to damage the gut, often silently. Read the full answer →
• “Only children get it, and you grow out of it.”
  It’s diagnosed at any age and it’s for life — feeling well on a gluten-free diet is healing, not a cure. Read the full answer →
• “You’d have to be underweight and have diarrhoea.”
  It shows up at any body size — fatigue, anaemia, skin or neurological signs, or no obvious symptoms at all. Read the full answer →

Testing myths

• “No symptoms means no damage.”
  Symptoms aren’t a damage gauge — silent coeliac disease still harms the gut lining. Read the full answer →
• “You can test after going gluten-free.”
  Get tested while you’re still eating gluten — cutting it out first can hide the diagnosis. Read the full answer →

Cross-contact myths

• “A little gluten now and then is fine.”
  Even trace gluten keeps the immune reaction going — which is exactly why cross-contact care and the ≤20 ppm standard exist. Read the full answer →
• “Heat destroys gluten, and a shared fryer is fine.”
  Cooking doesn’t destroy gluten — a shared fryer, toaster or pan is a real cross-contact risk. Read the full answer →

Menu and label myths

• “A gluten-free menu means it’s coeliac-safe.”
  A gluten-free menu is a start, not a guarantee — always ask about prep, the fryer and cross-contact. Read the full answer →
• “Wheat-free means gluten-free.”
  Wheat-free isn’t gluten-free — barley, rye and malt still contain gluten. Read the full answer →
• “Vegan food is gluten-free.”
  Vegan says nothing about gluten — plenty of vegan food is built on wheat. Read the full answer →

Grain myths

• “Spelt and sourdough are safe because they’re traditional.”
  Spelt is wheat, and traditional sourdough still contains gluten — neither is coeliac-suitable. Read the full answer →
• “Oats are always gluten-free — or never safe.”
  Oats aren’t automatically off-limits or automatically fine — choose certified gluten-free oats and introduce them carefully. Read the full answer →

How to correct a myth without the drama

You don’t have to win a debate — you have to stay safe and keep your table warm. A calm one-liner usually does it: “It’s actually an autoimmune condition, so even a crumb sets it off — but I’ve got easy ways to make it work.” Lead with the fix, not the lecture, and point people here if they want the detail.

Where to go next

New to all this? Start with Your First 90 Days with Coeliac Disease. Eating out soon? Read Eating Out Safely. Sharing a kitchen? See Sharing a Kitchen.

Sources: Coeliac UK; NICE NG20; Codex Alimentarius (gluten-free ≤20 ppm); AOECS. Last verified: 2026-07-20. This is general information, not medical advice — talk to your GP or a coeliac-aware dietitian about your own situation.