NCGS vs Coeliac Disease
Key differences between managing gluten intolerance (NCGS) and coeliac disease



Fast Facts:
β‘ Coeliac disease is an autoimmune condition requiring a strict, lifelong gluten free diet - even trace amounts must be avoided
β‘ Gluten intolerance (non-coeliac gluten sensitivity) varies by person - small amounts might be tolerated, but symptoms are the true guide
β‘ Daily choices around food, dining out, and shopping look different depending on which condition you have
β‘ This guide focuses on coeliac disease vs gluten intolerance
π€Ό Why the Distinction Matters
Unlike coeliac disease, where strict gluten avoidance is essential, gluten intolerance (also known as non-coeliac gluten sensitivity) varies from person to person. Many people with gluten intolerance follow a process of trial and error to figure out how much gluten - or which types - they can tolerate without symptoms.
Because of these medical differences, people navigating gluten free diets will approach them differently - especially when it comes to eating out, shopping, cooking at home, and reintroducing gluten.
It's important to note that even though gluten intolerant individuals can technically allow for small amounts of gluten, many choose to be super strict with what they consume in order to prevent any kind of flare ups.
π½οΈ Eating Out
When eating out, you might notice restaurant staff asking, "Is it an allergy or an intolerance?" - with coeliac disease typically (though not entirely accurately) grouped under the 'allergy' umbrella. This question helps them determine whether to take strict precautions against cross-contamination, or whether you're avoiding gluten for a more flexible reason.
For example, many restaurants offer 'gluten free' chips (fries), but if they're cooked in shared fryers with gluten-containing items, they're unsafe for those with coeliac disease - but may or may not be a problem for someone with a gluten intolerance.
This is a contentious issue because:
- Marking something as 'gluten free' when it's not safe for coeliacs can be misleading, and may put people at risk if they don't ask follow-up questions
- Whilst coeliacs must avoid all traces of gluten, some gluten intolerant individuals may also have strong reactions to trace amounts and choose to be equally as strict
- There should ideally be labelling to distinguish between items that are 100% gluten free (no gluten ingredients, cooked separately) and gluten free ingredients only, but cooked or prepared in ways that may involve cross-contact
That said, most people with gluten intolerance can tolerate small traces of gluten, so cross-contamination tends to be less critical in restaurants.
1οΈβ£ Eating Out with Coeliac Disease
- Inform staff you have coeliac disease
- Ensure food is prepared in a 100% gluten free environment - no shared fryers, utensils, or surfaces
- Avoid buffets or self-serve stations, where cross-contamination is likely
2οΈβ£ Eating Out with a Gluten Intolerance
- Let your server know you have a gluten intolerance, especially if you react to traces
- You might be okay with shared equipment, like fryers, but it depends on your symptoms and personal experience
- If you're unsure of your severity, it's best to be cautious at first
ππΌ Read all about how to communicate your dietary requirements when eating out
π³ Cooking at Home
If you live in a household where gluten is still present, preventing cross-contamination is key - but how strict you need to be will vary.
1οΈβ£ At Home with Coeliac Disease
- Use separate toasters, cutting boards, wooden utensils
- Store gluten and gluten free items away from each other
- Have separate condiments like jam, butter, and spreads or have a strict 'no double-dipping' rule
- Thoroughly clean kitchen surfaces before prepping gluten free meals
- Where possible, avoid sharing ovens/air fryers at the same time where gluten particles could circulate
2οΈβ£ At Home with a Gluten Intolerance
- You may or may not need separate utensils and appliances - it depends on how sensitive you are
- Storing gluten free products separately helps prevent mistakes
- Cooking gluten and gluten free food at the same time is usually fine, but listen to your body
In short, those with coeliac disease must eliminate any cross-contact, regardless of symptoms, whilst gluten intolerant individuals can adjust their precautions based on symptoms.
ππΎ Read more about preventing cross-contamination in the home
π Shopping for Gluten Free Food
Both those with coeliac disease and gluten intolerance need to read labels - but coeliacs have to be more cautious.
1οΈβ£ Shopping with Coeliac Disease
- Avoid products with 'may contain' warnings for gluten sources - even small traces can cause damage
2οΈβ£ Shopping with a Gluten Intolerance
- 'May contain' products might be fine unless you're particularly sensitive - adjust based on your symptoms , what's safe for one person may not be for another
ππ½ If you need an extra hand with understanding label reading and 'may contain' statements, click here
π Note: Some gluten free products contain gluten free wheat starch (de-glutenised wheat) - this is safe for coeliacs and gluten intolerant people when certified, but not suitable for someone with a wheat allergy.
π Reintroducing Gluten
One of the biggest differences between the two conditions is whether gluten can ever be reintroduced.
1οΈβ£ Reintroducing Gluten with Coeliac Disease
- Gluten must be avoided for life
- Even if you don't feel symptoms, it still causes internal damage
- Long-term exposure can lead to serious health risks
2οΈβ£ Reintroducing Gluten with a Gluten Intolerance
- Some people can reintroduce small amounts of gluten over time
- Keeping a food and symptom diary can help identify your personal limits
- Reintroduction should always be done with a doctor or dietitian's guidance
βBefore You Go Gluten Free...
Don't cut out gluten before being tested for coeliac disease.
For accurate results, you need to be eating gluten for at least 6 weeks before the blood test. Reintroducing gluten later can be difficult - and testing after eliminating gluten often leads to inconclusive results.
ππ½ Read more about testing for coeliac disease here
π― Quick Recap:
Whilst coeliac disease and gluten intolerance both require changes to your diet, the reasons behind them - and the level of strictness required - are very different.
Coeliac disease is an autoimmune condition - even trace gluten can cause lasting harm so avoidance must be lifelong
Gluten intolerance doesn't cause physical damage, but the symptoms are real and can be severe - so many people choose to be just as careful
There will should be key differences in the way different gluten conditions are managed when eating out, shopping, cooking at home and reintroducing gluten