Most tomato ketchup contains no gluten ingredients. A few do — and the culprits are always the same three lines on the label. Here's what to look for.
Yes — standard tomato ketchup is normally gluten-free. It's made from tomatoes, vinegar, sugar, salt and spices, none of which contain gluten. The risk comes from three specific ingredients that some recipes use: malt vinegar (made from barley), modified starch (occasionally wheat-derived) and natural flavourings (rarely, but not never).
If you have coeliac disease, "no gluten in the ingredients" is not the same as "gluten-free". Only a product carrying an explicit gluten-free label has been tested to the legal standard. Check the bottle, not the brand's reputation.
What ketchup is made of
Ketchup is a tomato-based condiment built on five things. Tomatoes or tomato concentrate give it the colour, body and natural sweetness. Vinegar adds the sharpness and does most of the preserving work. Sugar — cane sugar, high-fructose corn syrup or occasionally honey — balances the acidity. Salt lifts the flavour. Spices such as onion powder, garlic, clove, cinnamon and allspice round it off.
Look at that list and nothing on it contains gluten. That's why the honest answer to the question is "usually yes". The complications sit in the small print, not the recipe. If you want the wider comparison, we covered how ketchup differs from tomato sauce in a separate guide.
The three ingredients that can carry gluten
When a ketchup is not gluten-free, it's nearly always down to one of these.
| Ingredient | Status | Why |
|---|---|---|
| Tomatoes / tomato concentrate | No gluten | Naturally free from gluten in every form. |
| Distilled, spirit or white vinegar | No gluten | Distillation removes gluten protein, even where the source grain contained it. |
| Malt vinegar | Contains gluten | Made from barley and not distilled, so gluten protein remains. This is the main one to avoid. |
| Modified starch | Check the label | Usually maize or potato, occasionally wheat. UK law requires wheat to be flagged in the ingredients list. |
| Natural flavourings | Check the label | Rarely carries gluten, but the term is broad enough that a labelled product is the safer choice. |
| Sugar, salt, spices | No gluten | Free from gluten unless a blended spice mix has been bulked out with a wheat carrier. |
The same logic applies well beyond ketchup. Brown sauce and many steak sauces are built on malt or barley. Soy-based sauces usually contain wheat, which is why a lot of Asian cooking sauces are off the list — worth knowing if you're working through our guide to essential Asian sauces for stir-fries.
What "gluten-free" actually means in the UK
In the UK, "gluten-free" is a regulated claim, not marketing language. Coeliac UK explains the rule: a product can only be labelled gluten-free if it contains 20 parts per million of gluten or less, which is the internationally agreed safe threshold for people with coeliac disease.
Two practical consequences follow. First, a product with no gluten ingredients but no gluten-free label has not necessarily been tested — it may still pick up traces during manufacturing. Second, a product that carries the label is safe even if the ingredients list mentions barley malt extract, because the finished product has been measured.
If you're shopping for someone with coeliac disease
Treat the gluten-free label or crossed-grain symbol as the deciding factor, not the ingredients list. Coeliac disease is an autoimmune condition, and even small amounts of gluten cause damage. Anyone newly diagnosed should get dietary advice from their GP or a dietitian rather than relying on a shopping guide.
How to check a ketchup label in 5 steps
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Look for the gluten-free statement first
Front of pack, back of pack, or the crossed grain symbol. If it's there, you're done — everything below is only needed when it isn't.
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Find the vinegar and read which kind
Distilled, spirit, or white vinegar is fine. Malt vinegar is not. This single line resolves most cases.
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Scan for bold text in the ingredients
UK law requires the 14 major allergens to be emphasised, normally in bold, so wheat and barley will stand out. The Food Standards Agency sets out how this works.
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Read the "may contain" line
A precautionary warning about cereals containing gluten tells you the factory handles gluten elsewhere. For coeliac disease, that matters.
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Re-check when the pack size or country changes
The same brand can use different recipes for different formats and markets. Squeezy versus glass, UK versus imported — check each one.
Ketchup brands sold in the UK
These are the ketchups most UK shoppers will come across, from national brands to supermarket own-label:
- Heinz Tomato Ketchup
- Hellmann's Tomato Ketchup
- Co-op, Waitrose Essential and M&S own-label
- Tesco, Sainsbury's, Morrisons and Asda own-label
- Aldi Bramwells and Lidl Batts
Most of these use spirit vinegar rather than malt, and several carry a gluten-free statement. But recipes are reformulated regularly, and own-label products change supplier more often than branded ones. Read the bottle in front of you rather than trusting a list — including this one.
Ketchup and sauces we stock
We supply catering-format condiments to homes, cafés and takeaways across the UK — bottles by the case and portion sachets by the box. As with any brand, check the gluten-free statement on the pack you receive before serving to anyone avoiding gluten.
Ketchup and everyday table sauces
Tomato Ketchup 500ml (Case of 6)
Six squeezy bottles. The standard format for a busy kitchen.
From £9.55Shop
Ketchup Sachets (Case of 200)
Sealed single portions — the simplest way to avoid shared-bottle contamination.
From £5.40Shop
Mayonnaise 500ml (Case of 6)
Eggs, oil and vinegar — a simple recipe with little to hide.
From £11.99Shop
Sriracha 500ml (Case of 6)
Chilli, garlic, vinegar and sugar. A good ketchup substitute with heat.
From £10.36Shop
Sauces on our shelves that do contain gluten
Worth naming these plainly, because they're easy to reach for by mistake. Our Beer BBQ Sauce is made with real ale, and our Korean Barbecue Sauce contains soy sauce and seed malt — both list wheat or barley in the ingredients. Brown sauce is another category that traditionally uses malt, so check that one too.
Stocking a kitchen, not just a cupboard?
Case-size bottles, sachets and dips, delivered across the UK.
Gluten-free alternatives to ketchup
If you'd rather sidestep the question, several condiments are built on ingredients that don't involve gluten at all. Mustard is made from seed, vinegar and water. Mayonnaise is eggs, oil and vinegar. Fresh salsa is vegetables. Chutneys and relishes are fruit, vegetables, sugar and vinegar. Sriracha and most chilli sauces are chillies, garlic and vinegar.
Homemade ketchup is the other route, and it's less work than it sounds: tomato purée, distilled vinegar, sugar, salt and spices, simmered down. You control every ingredient, which is the only way to be certain.
Small-batch swaps worth a look
Spiced Mango Chutney
Chunky mango, fenugreek and cardamom. Good with cheese and cold meat.
From £4.95Shop
Smoky Onion Relish
Slow-cooked red and white onions with balsamic and fennel seed.
From £3.95Shop
Manfood Hot Chilli Sauce
Barrel-aged jalapeño and habanero. Hand-bottled in the UK.
From £4.95Shop
Peanut Satay Sauce
Ground in-house from a Malaysian family recipe. Contains peanuts.
From £3.64Shop
Ingredients and recipes change. Nothing here is a gluten-free guarantee for a specific product — always read the label on the pack you receive, and if you have coeliac disease, buy only what carries a gluten-free statement.
Are tomato sauces gluten-free too?
Usually, yes. A basic pasta sauce is tomatoes, olive oil, garlic, onion and herbs, none of which contain gluten. The exceptions turn up in richer, creamier sauces, where wheat flour or a roux is used as a thickener, and in some jarred sauces that use modified starch. Restaurant versions are harder to judge than jars, because you can't read the label — ask.
We went through the options in more detail in our guide to the best tomato sauces for pasta in the UK.
Where to buy ketchup and sauces in the UK
Aapon Mini Market stocks table sauces in household and catering formats — ketchup, mayonnaise, brown sauce, sriracha, chilli sauce and dips, alongside small-batch British chutneys and relishes. Everything ships UK-wide, with free delivery once your order passes £50.
Browse the full Condiments & Sauces collection, or the Spices range if you're making your own ketchup from scratch.
Frequently asked questions
Is Heinz Tomato Ketchup gluten-free?
Heinz Tomato Ketchup is made with spirit vinegar rather than malt vinegar, so it contains no gluten ingredients. Recipes and labelling can change, so check the current bottle for a gluten-free statement before serving it to someone with coeliac disease.
Does ketchup contain malt vinegar?
Most ketchup does not — spirit or distilled vinegar is the standard choice. Malt vinegar is far more common in brown sauce and some chip-shop style condiments. If a ketchup does use it, it will be named in the ingredients list.
Is modified starch in ketchup safe for coeliacs?
Modified starch is usually made from maize or potato, which contain no gluten. If wheat has been used, UK labelling law requires it to be declared and emphasised in the ingredients list, so it will be visible.
Can I use ketchup sachets to avoid cross-contamination?
Sealed single-portion sachets remove the risk of a shared bottle being contaminated by a knife or a crumb-covered plate. The sachet contents still need to meet the gluten-free standard, so check the case labelling.
Do you deliver condiments and sauces across the UK?
Yes — we ship UK-wide, with free delivery once your order passes £50. Full details are on our shipping policy page.
Restock the sauce shelf
Ketchup, mayo, chilli sauce, chutneys and dips — bottles, jars and sachets.