IBS Food Diary
An IBS food diary records what you eat and drink alongside your gut symptoms (pain, bloating, bowel changes) so you can spot which foods set off flares. It is the standard first step before trying a structured approach like the low-FODMAP diet.
This is general educational information, not medical advice. A food diary is a tool to spot patterns — it does not diagnose. For persistent or severe symptoms, or any red-flag signs mentioned below, see a doctor or registered dietitian.
Irritable bowel syndrome has no single trigger food — the whole point of a food diary is that your triggers are yours. Registered dietitians almost always start here: a week or two of food-and-symptom logging turns a frustrating guessing game into a shortlist.
It also sets you up for the low-FODMAP protocol, the most evidence-backed dietary approach to IBS. That process only works if you are already tracking food and symptoms carefully — the diary is the foundation.
Keep your food diary in your pocket
RecipeAI logs meals in seconds and time-stamps everything automatically — so spotting the pattern behind your IBS is just scrolling back, not decoding a paper notebook.
Start a free food diaryWhat to track
- All food and drink, with rough portions and times
- Symptoms: abdominal pain, bloating, gas, urgency, and stool changes (the Bristol scale helps)
- Symptom timing and severity (1–10)
- Stress and sleep — the gut-brain axis is real, and stress alone can trigger IBS flares
- For some, where you are in your menstrual cycle
Common IBS triggers to watch for
- High-FODMAP foods: onion, garlic, wheat, beans/lentils, certain fruits
- Dairy (lactose)
- Caffeine and alcohol
- Fatty or fried foods
- Spicy foods
- Large meals and irregular eating patterns
How to run your food diary
- 1
Track food and symptoms together for 1–2 weeks
Both halves matter — food without symptoms, or symptoms without food, tells you nothing.
- 2
Note timing and severity
IBS reactions can be quick or delayed; timestamps let you connect them.
- 3
Bring it to a dietitian
A GI dietitian can read your diary and guide a structured low-FODMAP elimination and reintroduction — much safer and more effective than DIY elimination.
- 4
Reintroduce methodically
The goal is the widest possible diet that keeps you comfortable, not permanent restriction. Reintroduction (tracked in the diary) is how you get foods back.
Tips & cautions
Do not stay on a strict elimination diet long-term without guidance — it risks nutrient gaps and can worsen your relationship with food.
Stress management is part of IBS care, not a side note — track it alongside food so you can tell a stress flare from a food flare.
Red-flag symptoms (blood, unexplained weight loss, anemia, onset after age 50) warrant medical review, not just journaling.
Frequently asked questions
How do I start an IBS food diary?
Log every food and drink with times and portions, and alongside it record your symptoms — pain, bloating, and stool changes — with timing and a 1–10 severity. Keep it for one to two weeks, then review for patterns or take it to a dietitian.
What are the most common IBS trigger foods?
High-FODMAP foods (onion, garlic, wheat, legumes), dairy, caffeine, alcohol, fatty foods, and large meals. Triggers vary person to person, which is why a diary is the recommended starting point.
Is a food diary better than just trying the low-FODMAP diet?
They work together. A food diary is the tracking tool that makes the low-FODMAP elimination-and-reintroduction process work, and it is best done with a dietitian rather than alone.