Start with the instructions in your appointment letter or message. If the service has not given you a specific list, a useful set to bring is: a short symptom summary, an up-to-date medicines and supplements list, and any recent food-and-symptom record you already have. Add relevant results or letters only when you have been asked for them or they are easy to access.
You do not need a perfect diary or a theory about which food is responsible. Honest gaps, ordinary meals and occasions that do not fit a suspected pattern can be more useful than a polished record reconstructed from memory.
Check the appointment instructions first
Dietetic services do not all request the same information. Some send their own form, ask for a particular number of diary days or already have access to referral notes and test results. Follow those instructions before using a general checklist.
For example, Royal Free London’s specialist gastroenterology dietitian service provides a three-day food diary and asks about current medicines and supplements. That guidance is for people referred after a diagnosis of IBS or a functional bowel disorder. It is a local service request, not a universal rule for every dietitian appointment.
If you are unsure whether to complete a form, send records in advance or bring them on the day, contact the service using the details in your appointment message. For a video or telephone appointment, check the link, device and privacy arrangements too. Queensland’s public gastroenterology dietitian service suggests having medicines and available pathology results nearby for a virtual appointment, but your own service may work differently.
Bring a short symptom summary
Give the dietitian a compact description of what has been happening before handing over a long diary. Include:
- the symptom or change you most want help with;
- when it began and whether it is changing;
- how often it happens and roughly how long it lasts;
- bowel changes, if they are part of the concern;
- how it affects eating, sleep, work or ordinary activities;
- what you have observed, including what remains unclear.
That Royal Free London service also asks about bowel habits, other symptoms, medical conditions, usual food and drink, lifestyle and recent symptom history. Its suggested time periods and questions are specific to that service and population. They are useful examples of the kind of history a dietitian may discuss, not a diagnostic checklist for everyone.
If you want a one-page structure, use the free digestive symptom appointment summary template. You can also read how to summarise digestive symptoms without needing a flawless diary.
Add a food-and-symptom record if it is useful
Bring the service’s diary if one was provided. Otherwise, a short record from ordinary days may help you remember:
- approximate meal, snack and drink times;
- the main foods and obvious ingredients;
- rough portions and meaningful preparation details;
- symptom type, onset, severity and duration;
- symptom-free occasions and information that is missing;
- selected context, such as illness or an unusual routine, when it genuinely helps comparison.
Do not change what you eat to create a tidy-looking diary unless a qualified professional has already asked you to follow a specific plan. Record what normally happened and mark uncertain ingredients or missed entries as unknown.
There is no appointment-wide rule that everyone needs the same number of diary days. Royal Free’s specialist gastroenterology page uses a three-day food diary alongside a broader symptom overview, while Leicestershire Nutrition and Dietetic Service simply says a food-and-symptom diary can be useful before an appointment. These are service instructions rather than evidence that a particular duration identifies a cause.
For a manageable entry format, see what to record in a food and symptom diary.
Keep observations separate from conclusions
If you suspect a food is involved, bring the full comparison rather than only the entries that support the suspicion. Note:
- when the food or meal appeared before the symptom;
- occasions when you ate it without that symptom;
- occasions when the symptom occurred without it;
- other changes and missing information that make the pattern less certain.
Phrase the result as an observation: “I noticed this sequence three times, but there were also two occasions without symptoms” is more faithful than “this food is my trigger”. A food-and-symptom record cannot diagnose an intolerance or prove causation.
Do not cut out several foods while waiting for the appointment in an attempt to clarify the pattern. Current NHS food-intolerance guidance says a diary may be requested and advises against removing foods without guidance from a GP or dietitian. That page is about suspected food intolerance, so it does not mean your symptoms have that explanation. Its relevant safety point is that unsupported restriction can be harmful.
Bring medicine details and relevant existing records
Write down the names and doses of prescribed medicines, over-the-counter products, vitamins and supplements you currently take, if known. Include recent changes, but do not stop or alter a medicine because of a diary pattern; discuss questions with the prescriber, pharmacist or dietitian as appropriate.
Bring relevant letters, test results or previous dietetic plans when the service has asked for them or they are not already available in its records. Do not arrange new tests solely to complete this checklist. If you are unsure what the dietitian can see, ask the service rather than assuming you need to collect an entire medical file.
It can also help to write down two or three priorities for the appointment. These might be what you most want to understand, which part of recording feels difficult, or what a realistic next step would look like. A dietitian can then decide what information is clinically relevant and what can be left out.
Do not delay care to complete the folder
An appointment can still be useful when the diary is incomplete. Say what is missing and bring the record you have. Do not postpone professional care while waiting for another symptom episode or a clearer food pattern.
If symptoms are new, worsening or worrying, contact an appropriate healthcare professional rather than relying on an upcoming dietitian appointment. A dietitian can support nutrition-related assessment and planning, but a preparation checklist cannot assess urgency or replace medical care.