GERD triggers are personal.
Find yours.
The generic 'avoid these foods' list is wrong for most people. GutDiaries learns which foods actually correlate with your symptoms — not what a textbook says should trigger reflux.
- 73%
- of users find a trigger
they hadn't suspected - 14 days
- median time to first
clear pattern - 4.8★
- App Store rating
from GERD users
The science
Why the same diagnosis produces different triggers
"GERD" covers several distinct mechanisms. The physiology driving your reflux determines which foods matter — and most trigger lists ignore this entirely.
LES (Lower Oesophageal Sphincter) Dysfunction
The LES normally holds 10–35 mmHg above gastric pressure. Reflux mostly happens during transient LES relaxations (TLESRs) — brief muscle misfires triggered by gastric distension after meals. Certain foods lower LES tone or increase TLESRs, making misfires more likely. Large meal volume matters as much as what's in the meal.
Triggers with consistent evidence for this type
What the research actually says
No two people with GERD share the same trigger list.
Trigger foods differ from person to person. Heterogeneous results on coffee, chocolate, and acidic foods make personalised trial-and-error more rational than categorical bans.
American College of Gastroenterology guidelines · supported by a 2025 narrative review of GERD diet interventions
Coffee is a genuine trigger for some and irrelevant for others. Same with chocolate, citrus, and spice. The standard of care is now personalised identification — not a generic list.
Complete reference
Common GERD triggers by cause category
Every item below is a documented food that causes acid reflux in some GERD patients — alongside what the evidence actually says.
| Trigger food / behaviour | Evidence |
|---|---|
| 🔓 LES-relaxing — weakens the valve that keeps acid down | |
| Alcohol | Consistent |
| High-fat meals | Consistent |
| Peppermint / mint | Variable |
| Chocolate | Variable |
| Coffee | Variable |
| Garlic & onion | Limited |
| Full-fat dairy | Limited |
| 🫧 Pressure & motility — increases gastric pressure or slows emptying | |
| Large meal volume | Consistent |
| Late meals (within 3 hrs of bed) | Consistent |
| Carbonated drinks | Consistent |
| High-fat meals | Variable |
| High-fibre meals (in gastroparesis) | Limited |
| 🔥 Direct irritants — inflame oesophageal or laryngeal lining on contact | |
| Citrus juice | Variable |
| Tomato products | Variable |
| Spicy foods | Variable |
| Vinegar & pickled foods | Variable |
| 📈 Systemic / dietary pattern — promote weight gain and chronic inflammation over time | |
| High-sugar / refined carbs | Limited |
| Processed & cured meats | Limited |
| Western fast-food diet | Limited |
"Consistent" = multiple clinical studies and guidelines agree. "Variable" = real mechanism, but individual responses differ markedly. "Limited" = mostly small studies or patient reports. Source: ACG guidelines, 2015 systematic review, NIH PMC dietary GERD reviews.
Real patterns
Same diagnosis. Completely different triggers.
Three GutDiaries users, all diagnosed with GERD.
Sarah, 41
GERD — LES dysfunction
Her triggers: Chocolate and red wine — both reduce LES pressure. She can eat spicy food and citrus daily with zero symptoms. Her GI told her to avoid coffee; the app showed coffee had no correlation with her symptoms at all — consistent with what large cohort data actually find.
James, 55
GERD — hiatal hernia
His triggers: Late, large meals — not specific foods. He moved dinner two hours earlier and halved his portion size. Symptom-free without any food elimination. Chocolate, coffee, spicy food — no correlation found. His issue was timing and volume, not ingredients.
Priya, 34
LPR (silent reflux)
Her triggers: Sparkling water and citrus — both below pH 5, the threshold at which laryngeal tissue becomes vulnerable. No heartburn, just persistent throat-clearing. Eliminating carbonated drinks was the single largest change; a low-acid approach reduced her Reflux Symptom Index by over 50%.
From the App Store
What GERD users say
★★★★★
“I'd avoided coffee for two years because everything I read said it causes acid reflux. GutDiaries showed me coffee wasn't my trigger at all — large late dinners were. I have coffee every morning now and no symptoms.”
Michael T. · GERD, 4 years
★★★★★
“My GI gave me the standard list. Half of it had zero correlation with my symptoms. My actual trigger was sparkling water — which nobody ever mentioned. Found it in 11 days.”
Emma K. · LPR / silent reflux
★★★★★
“What got me wasn't a food at all — it was eating dinner at 9pm. Moved dinner to 6:30, same foods, no symptoms. Would never have spotted that without the timeline view.”
David R. · GERD with hiatal hernia
Stop guessing. Start tracking.
Find the foods — and behaviours — that actually trigger your GERD. Free to start. No account needed.
GutDiaries is a self-guided tool designed to help users track their diet and symptoms to better understand their dietary and health patterns. It is intended for informational and self-management purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.