Phase wizard
Pick a protocol, get your start date, elimination window and reintroduction schedule auto-built.
- Calendar integration
- Daily checklist
- Phase-aware insights
Elimination diet
Find your triggers methodically, not by guessing.
An elimination diet removes likely food triggers for several weeks, then reintroduces them one at a time. A Gut Day handles the schedule, tagging and pattern detection - you focus on how you feel.
What is an elimination diet?
An elimination diet is a temporary, structured experiment. You remove the most common food triggers (gluten, dairy, eggs, soy, corn, nuts, nightshades, citrus, sometimes more) for 3 to 6 weeks. Then you reintroduce one food at a time, with washout days, and log how you respond. Done properly it produces the most personal trigger list possible. Done sloppily it produces noise. The difference is rigour - which is exactly what an app is good at.
Three protocols, one app
Standard elimination
Remove top 8 trigger foods for 4 weeks. Reintroduce one per 3-day cycle.
Whole30-style
30 days of strict whole foods, then methodical reintroduction.
Custom personal
Build your own list with help from a dietitian. The app handles scheduling and tracking.
How A Gut Day helps
Built for this exact problem
Reintroduction calendar
One food at a time, three doses, three-day washout. The app prevents accidental double-tests.
- Auto-scheduled tests
- Built-in washout days
- Tolerance card output
Symptom diary with delays
Some reactions show in 30 minutes, some in 48 hours. The app respects different windows.
- Adjustable reaction windows
- Severity scoring
- Cluster detection
Final report
Clear PDF with: foods that caused symptoms, foods that did not, doses you tolerate, recommended reset days.
- Shareable with dietitian
- Per-food breakdown
- Visual timeline
How A Gut Day runs an elimination diet with you
- 1
Pick a protocol
Standard 8-food, Whole30-style or custom. Each comes with a default schedule.
- 2
Elimination window
Log every meal. The app warns when an eliminated food slips into something you scanned.
- 3
Reintroduction phase
One food per cycle. Three doses across three days, three-day washout, repeat.
- 4
Get your report
After all foods are tested, the app produces your personal tolerance map.
Why most DIY elimination diets fail
The two killers are: forgetting which day you reintroduced what, and accidental contamination during elimination. Both are bookkeeping problems, not dietary problems.
A Gut Day's phase wizard plus the EU-label scanner handle both. The result: most users finish the full protocol in 8 to 10 weeks, with a clear tolerance list at the end.
When elimination is the right tool, and when it is not
Elimination shines when you suspect specific food triggers but cannot pinpoint them. It is overkill for general digestion improvement and unhelpful when stress, sleep or fast eating are the real drivers.
The app's first-week data usually reveals which case you are in - so you do not commit to 8 weeks of restriction unnecessarily.
Frequently asked questions
- Do I need a dietitian to do an elimination diet?
- Strongly recommended, especially for medically complex cases or kids. The app produces a clear PDF report your dietitian can use directly.
- How long does the full protocol take?
- Typically 8 to 12 weeks: 4 weeks elimination + 4 to 8 weeks reintroduction depending on how many foods you test.
- Is this the same as low-FODMAP?
- No. Low-FODMAP targets specific carbohydrates. Elimination targets common allergens and sensitivities (gluten, dairy, eggs, soy, etc.). They can be combined but it is intense.
- Can I do an elimination diet while pregnant or breastfeeding?
- Only with medical supervision. Restrictive diets can leave nutrient gaps in those phases.
- What if I crave something I eliminated?
- Log the craving. Strong cravings sometimes correlate with the foods you actually react to. It is data, not weakness.
Run elimination the smart way
Free phase wizard, reintroduction calendar and final tolerance report.
Create your free account