Food and Colitis: What to Track

“Was it something I ate?” is one of the first questions most people with ulcerative colitis ask. It’s also one of the hardest to answer from memory. Meals blur together, bad days blur together, and by the end of the week it’s easy to blame whatever you happened to eat before the worst one.

A simple food log won’t give you a final answer. What it does give you is a clear record of what you ate and how your days went, side by side, so you can look back instead of guessing.

Why food is hard to work out from memory

• Days blur. Few of us remember what we ate last Tuesday, let alone how much.
• It’s rarely one thing. Stress, sleep, a busy week and your condition itself all affect how you feel, along with food.
• Timing varies. How you feel today isn’t always about today’s lunch.
• We remember the dramatic days. One bad night after a takeaway sticks in memory; ten fine days after the same meal don’t.

That’s not a reason to give up on food. It’s a reason to write things down.

What to log

Keep it quick enough that you’ll still do it on a bad day. A useful food entry has:

• What you ate. The main foods are enough. You don’t need every ingredient.
• Roughly how much. A small bowl or a big plate is fine.
• When. Time of day, or just breakfast, lunch, dinner or snack.
• A few tags. Dairy, gluten, spicy, high fat, high fiber, alcohol, caffeine. Tags make it far easier to look back across weeks.

And alongside your meals:

• BMs: how many, blood, urgency and pain, plus stool type if you find it useful. See the Bristol Stool Chart for IBD.
• Stress: a quick 1 to 10.
• Anything unusual: travel, a late night, being unwell, a big event.

How to look back

After two weeks or so, look at your days side by side rather than one at a time:

1. Find the rough days. Which days had more BMs, blood or urgency?
2. Look at what came before them. What did you eat that day and the day before? What else was going on?
3. Look at the good days too. Did the same foods turn up on days that went fine?
4. Look at tags, not single meals. “Dairy turned up on 6 of 14 days” is easier to think about than a list of meals.

If something seems to keep turning up, that’s worth noting. It isn’t proof. It’s a question to bring to your care team or a dietitian.

What a food log can’t tell you

Being honest about this matters, because it’s easy to read too much into a few weeks of notes.

• It can’t prove cause and effect. Two things happening on the same days doesn’t mean one caused the other.
• It can’t tell food from inflammation. If your UC is active, almost anything can feel worse. That’s a conversation for your care team, not a diet change.
• It can’t replace professional advice. Cutting out foods on a hunch can leave you eating less widely than you need to. If you’re thinking about changing your diet, talk with your care team, and ask about a dietitian who knows IBD.

What a log does do well is turn “I think dairy is bad for me” into “dairy was on 6 of my 14 days, and 4 of those were rough ones”. That’s a much better starting point for a conversation.

Talking it over with your care team

When you bring a food question to your care team, a short summary helps:

• How the last few weeks went: BMs a day, days with blood or urgency.
• What you noticed, and how often.
• What else was going on.
• What you’d like to ask: for example, whether a dietitian or a test would help.

How Flarely helps

Flarely makes the logging part quick. Snap a photo of your meal and it lists the foods it sees and adds tags like dairy, gluten or spicy, with an estimated FODMAP level. You check it and change anything before saving. A BM is three taps, and stress is one.

The 14-day plan lets you pick two things to keep an eye on, for example dairy and urgency. On day 13 you get your own summary, with what you remembered next to what you actually logged. The Summary tab counts meals by tag over 7, 30 or 90 days. Flarely doesn’t tell you what caused what; it lays out your days so you can see them for yourself.

For more on food, see FODMAPs and IBD: A Plain Guide and What to Log Each Day With IBD.

Frequently asked questions

What should I log about food with ulcerative colitis?

What you ate, roughly how much, and when, plus a few tags. Log your BMs and stress alongside so you can see your days side by side.

Can a food log tell me which foods cause my symptoms?

Not on its own. It helps you notice things worth talking over with your care team or a dietitian, but it can’t prove cause and effect.

How long should I log food before looking back?

Two weeks is a good first look. A few weeks of steady logging shows much more than a perfect log of a few days.

---

Flarely is for your own wellbeing. This guide isn’t medical advice. Talk with your care team before changing your diet or treatment.