The decision about whether a restaurant is safe to eat at does not start when you sit down. It starts before you book.
When you have a food allergy, intolerance or diet, the research phase is part of the process. Most of it is about avoiding bad experiences. The other part is about avoiding the awkward conversation where you ask a lot of questions, get vague answers, and leave without eating.
This article covers what to look for, where to look, and how to interpret what you find.
Start with the website
Not every restaurant has a good website. But most have one, and it usually tells you something useful – even if that something is that there is no allergen information.
The first thing to look for is allergen information at dish level. This means something more specific than a generic disclaimer at the bottom of the page, like actually being able to look at a specific dish and understand what allergens it contains.
Some restaurants go further with a dedicated key, an allergen filter on the menu. These are green flags. They signal a kitchen that has thought about this and is a solid indicator that they are going to handle allergens well.
On the other hand, if there’s only a note that says "please inform your server of any allergies or dietary requirements" - this is not really information. It is a prompt that you have to do all the work yourself, at the table, during service. It tells you nothing upfront before you make a decision of where to eat, which is frustrating, but sadly the most common reality.
What the menu tells you
If allergen information is on the website, look at how it is presented.
Dish-level allergen information is the most useful. Knowing that the risotto contains dairy and the pasta contains nuts lets you make a decision before you arrive.
Look for specificity. A menu that lists the 14 major allergens against each dish is doing the work properly. While a menu that says "V, VE, GF" without explaining what those mean tells you less than it appears to.
Be cautious about "GF available" without any further context. It may mean the dish can be modified to remove gluten-containing ingredients. It may also mean they will simply remove the burger bun, not replace it with anything, and not change any other part of the preparation.
How to use review platforms
Google, TripAdvisor, and Yelp aren't built for the allergy space, but they can still provide useful context if you know what to search for. Reviews are more useful than most people realise when researching for allergies.
Search the restaurant's name plus words like "allergy," "coeliac," "dairy-free," "nut allergy," or the specific allergen you are managing. If other people with the same restriction have eaten there and left a review, the language they use can tell you a lot.
Look for detail. A review that says "they were very accommodating" is less useful than one that says "the chef came out to confirm what was in the dish and the server confirmed again when they put the plate down." Specific language usually indicates a genuine experience.
Look at negative reviews too. One bad experience does not make a restaurant unsafe. But a pattern of comments about vague allergen information, staff who didn't seem to understand the question, or an incident that went wrong – those are worth listening too.
Beyond generic review platforms, there are apps built specifically around allergy-aware dining. In the UK, Trustdiner and Allergy Companions both collect community reviews from people managing food allergies and intolerances, with more targeted signals than general review sites. In the US, Allergy Eats rates restaurants specifically on how well they handle allergen requests.
Red flags
Some things are worth treating as a signal that more information is needed before booking:
A menu with no allergen information at all, and no obvious way to find it. It may be that the information exists but isn't on the website – worth a phone call – but the absence itself is a flag.
"We cannot guarantee our food is free from all allergens" as the only allergen-related statement on the menu. This disclaimer appears on almost every restaurant menu, including serious allergy-aware ones. On its own, without any other supporting information, it is not enough.
A menu that uses "gluten-free" and "gluten friendly" interchangeably. These are not the same. Gluten-free means no gluten-containing ingredients. Gluten friendly generally means an effort has been made but full separation cannot be guaranteed. For coeliac disease, that distinction matters.
No contact details, or a website that seems to have been last updated some time ago. Out-of-date menus are a real issue – the information may have been accurate when it was posted and may no longer be.
Green flags
A dedicated allergen or dietary section, separate from the general menu, is a good sign. It suggests the restaurant has spent time thinking about this and organised it in a way that is useful to people who need it.
Dish-level allergen information that is clearly maintained and current. Some restaurants use digital menus that can be updated in real time – this is ideal, because it means what you see reflects what is currently being served.
Staff contact details or a specific note to call ahead and speak to someone. Not a generic contact form – a phone number, or a note that says "please call us to discuss your dietary requirements." This signals a kitchen that wants to have the conversation rather than deflect it.
Information about how dishes are prepared and what the cross-contamination risks are. A restaurant that says "our kitchen handles x, y and z" is giving you genuinely useful information, even if it means you cannot eat there. That is better than nothing.
When to call versus when the website is enough
If the information on the website is complete and answers your questions – you may not need to call.
If there are gaps (i.e dishes that don't have full allergen information, uncertainty about preparation methods, or questions about cross-contamination risks that aren't addressed), always call before you book.
The goal of the research phase is to get to a point where you know what you are dealing with before you arrive. The more information you have in advance, the smoother the table conversation will be.