Find your IBS food triggers
in 4 weeks
Test one suspect food each week, check in each evening, and get a clear answer: trigger, or safe for you.
Available on iPhone, iPad and Android.
How I use Gut Lens
Built for people with IBS. One simple step a day, and a clear answer at the end of each week.
Week 1 of 4 · Testing dairy
Today
Start here
A few small steps to get going
See how your 4 weeks work
Log your first meal
Check in tonight
Try a Calm Gut session
Skip day 2 of 3 · Day 4 of 28
Skip dairy
Avoid dairy today. Try lactose-free milk or oat milk instead.
See swapsI test one food a week
I pick one suspect food, from the list or my own, and follow the same 7-day pattern dietitians use. Gut Lens tells me what to do each day.
How does a test week work?+
For two days you eat as usual, so there's a baseline. For three days you skip the food, with swaps and tips for each day. For the last two you bring it back and watch what happens.
Which foods can I test?+
Dairy, wheat and gluten, onion and garlic, beans and lentils, fruit sugars, sweeteners and stone fruit, caffeine, spicy food, fried food, alcohol, and stress. You can also add any food of your own and test it the same way.
Week 1 · Day 4
Forest Floor
Gut-directed relaxation · 10 min
I calm my gut with Calm Gut
Stress can set off my IBS as much as food can. A short guided session each day helps settle my nervous system and my gut.
What is a Calm Gut session?+
Guided, gut-directed relaxation: a 10-minute audio session, one a day, with slow waves on screen that breathe with you.
What if I only have a minute?+
There's quick breathing for tense moments, and the week-by-week programme is there when you have time for a full session.
Your trigger plan
Results
Onion & garlic are a trigger for you
Your symptoms eased while you avoided them and came back when you reintroduced them.
Report for your doctor
I know what's a trigger, and what's safe
Every finished week gets a verdict. Over four weeks that becomes my personal trigger list, plus a report I can take to my doctor.
What verdicts can a week get?+
Trigger, likely trigger, unclear, or safe for you. It comes from comparing how you felt while eating the food, skipping it and bringing it back.
Can I share my results with my doctor?+
Yes. The doctor report is a clear summary of your results that you can share with your GP or dietitian.
Meet Fern
Fern is the guide inside Gut Lens. She walks you through each week of your plan, one small step a day.
Tells you what to do today
What to eat, what to skip, and easy swaps for the food you're testing.
Checks in each evening
A quick question about how your gut felt. It takes a few seconds.
Explains your result
At the end of each week, she tells you what it means: trigger, or safe for you.
Fern is not a doctor. She helps you spot patterns and know when to talk to yours. Your doctor or dietitian decides your treatment.
On a skip day
Fern
Skip days can feel like a lot. If you slip up, just tell me tonight. It still helps your result.
When a week has an answer
Fern
Finding a trigger is progress, not a setback. It doesn't mean giving up dairy for good. I'll show you swaps that may suit you.
On a rough day
Fern
Rough day? Start with 2 minutes of breathing. You don't have to do a full session.
Logging that takes seconds
The plan does the thinking. These tools make the daily part easy.
Scan a meal
Snap a photo for a FODMAP breakdown and a safety rating in seconds.
Log by voice
Say what you ate or how you feel. Gut Lens fills in the rest.
Scan a menu
Eating out? Photograph the menu and see your safest picks first.
Symptoms and bowel tracking
Log symptoms in a couple of taps, with a Bristol stool chart kept private to you.
Meal plan
A week of meals built around your triggers, with recipes.
Toilet finder
Nearby restrooms when you need one, fast.
Common questions
The plan
How does Gut Lens find my triggers?+
You test one suspect food per week. For two days you eat as usual, for three you skip it, and for two you bring it back, checking in each evening. Comparing how you felt across those phases shows whether that food is a trigger for you.
Which triggers can I test?+
Dairy, wheat and gluten, onion and garlic, beans and lentils, fruit sugars, sweeteners and stone fruit, caffeine, spicy food, fried food, alcohol, and stress. You can also add any food of your own and test it the same way.
Is this the low-FODMAP diet?+
It follows the same idea of removing a food and reintroducing it, but one food at a time and in short weeks, so it's easier to stick to.
Everyday use
Do I need to log every meal?+
No. The only thing each day asks for is a quick evening check-in. Scanning and logging meals is there if you want more detail.
Privacy & security
Is my health data private?+
Yes. Your data is encrypted and stored securely, we never sell your personal health information, and we only share it with the service providers that help us run the app. See our Privacy Policy for the details.
Clinical
Does Gut Lens replace my doctor?+
No. Gut Lens helps you gather evidence about your own body. Talk to your doctor or dietitian about diagnosis and treatment, and use the in-app report to share what you found.
Start with one food.
Start your 4-week trigger plan today. It takes a minute to set up.