Several categories of food and drink can worsen GERD by either relaxing the muscular valve between your esophagus and stomach or by irritating the esophageal lining directly. The most common culprits include chocolate, alcohol, coffee, carbonated drinks, spicy foods, citrus, tomato-based foods, peppermint, fatty and fried foods, and raw onions. That said, triggers vary from person to person, and the American College of Gastroenterology recommends identifying your own trigger foods rather than following a universal elimination list.
How Food Triggers Reflux
At the base of your esophagus sits a ring of muscle called the lower esophageal sphincter (LES). It opens to let food into your stomach and closes to keep stomach acid from flowing back up. When certain foods relax that valve, weaken its pressure, or increase acid production, the result is the burning sensation and regurgitation that define GERD. Some foods cause trouble through a single mechanism; others hit you from multiple angles at once.
Chocolate
Chocolate contains a compound called methylxanthine, which is chemically similar to caffeine. It directly relaxes the lower esophageal sphincter, making it easier for acid to escape upward. On top of that, chocolate is often high in fat and sugar, both of which slow stomach emptying and keep acid in contact with the valve longer. Dark chocolate, milk chocolate, and cocoa-based drinks can all cause problems, though higher cocoa concentrations tend to deliver more methylxanthine per serving.
Fatty and Fried Foods
High-fat meals are among the most reliable GERD triggers. Fat slows the rate at which your stomach empties, which means food and acid sit in the stomach longer. This extended contact increases the odds that acid will push past the LES. Fried foods, full-fat dairy, fatty cuts of meat, butter-heavy sauces, and creamy desserts are frequent offenders. The effect is dose-dependent: a small amount of fat in a meal is usually tolerable, but a greasy or heavily sauced plate is far more likely to provoke symptoms.
Coffee and Caffeinated Drinks
Caffeine relaxes the LES in much the same way methylxanthine in chocolate does. Coffee poses a double challenge because it also stimulates acid secretion in the stomach, increasing the volume of acid available to reflux. Some people tolerate a single cup of coffee in the morning but not a second, while others find that switching to a low-acid or cold-brew variety helps. Tea and energy drinks can trigger the same response, though typically to a lesser degree because their caffeine content is lower per serving.
Alcohol
Alcohol relaxes the lower esophageal sphincter and can directly damage the esophageal lining. Both of those effects increase reflux symptoms and, over time, raise the risk of more serious esophageal injury. Wine and spirits tend to provoke more symptoms than beer in many people, though beer’s carbonation introduces its own problems. Even moderate drinking can worsen nighttime reflux if it happens within a few hours of bedtime.
Carbonated Beverages
Sodas, sparkling water, and other fizzy drinks release carbon dioxide gas in the stomach, causing distension and increasing pressure against the LES. A randomized crossover trial found that drinking 330 mL (about 11 ounces) of carbonated cola triggered higher levels of fullness, heartburn, and belching compared to flat water, even though that volume alone wasn’t enough to dramatically increase reflux events on measurement. Larger servings, or carbonated drinks consumed alongside a full meal, compound the problem. If the drink also contains caffeine or citric acid, you’re stacking multiple triggers at once.
Spicy Foods
Capsaicin, the compound that gives chili peppers their heat, does not appear to slow stomach emptying or change how much acid your stomach produces. What it does do is make your esophagus more sensitive to the acid that’s already there. In one study, capsaicin didn’t change overall heartburn severity, but it significantly shortened the time to peak heartburn: symptoms peaked at 120 minutes with capsaicin versus 247 minutes without it. The effect is sensory rather than mechanical. Your esophagus reacts to normal levels of acid as though they were more painful. If you already have an irritated esophageal lining, spicy foods can make even mild reflux feel intense.
Citrus and Tomato Products
Oranges, grapefruits, lemons, tomatoes, and anything made from them (orange juice, marinara sauce, salsa) are highly acidic on their own. When these foods reach an already-irritated esophagus, they can cause a direct burning sensation even without a true reflux event. For people with active inflammation, these foods essentially pour acid on an open wound. Cooking tomatoes into sauce concentrates their acidity, which is why pizza and pasta with red sauce are such common triggers.
Peppermint
Peppermint relaxes smooth muscle throughout the digestive tract, and the LES is no exception. The mechanism involves blocking calcium channels in the muscle cells, which reduces the valve’s ability to stay tightly shut. Peppermint tea, peppermint candies, and peppermint oil supplements can all provoke reflux. This is worth knowing because peppermint is often marketed as a digestive aid, and while it can help with nausea or bloating in people without reflux, it tends to make GERD worse.
Raw Onions and Garlic
Raw onions are a particularly common trigger for heartburn. Cooking onions breaks down some of the compounds responsible, so many people who can’t tolerate raw onions in a salad do fine with sautéed or caramelized onions. Garlic has a similar but generally milder effect. If onions and garlic bother you, experimenting with cooked versus raw preparations is a practical first step before cutting them out entirely.
Meal Timing Matters as Much as Food Choice
What you eat is only part of the picture. When you eat plays an equally important role, especially for nighttime symptoms. Eating within two hours of lying down more than doubles the likelihood of reflux compared to waiting longer. A study of 147 GERD patients and 294 controls found that dinner-to-bedtime intervals shorter than three hours were significantly associated with increased reflux risk, while intervals of four hours or more were protective.
Meal size also matters. Eating your largest meal at lunch and keeping dinner smaller reduces the volume of food and acid in your stomach when you eventually lie down. Combining an earlier, lighter dinner with sleeping on your left side and elevating the head of your bed creates a meaningful reduction in both the frequency and severity of nighttime reflux episodes.
How to Identify Your Personal Triggers
The foods listed above are the most common offenders across the GERD population, but individual responses vary widely. Some people eat tomato sauce without any trouble but can’t tolerate coffee. Others drink coffee daily with no issues but flare up after chocolate. The ACG recommends a personalized approach: rather than eliminating every possible trigger at once, keep a food and symptom diary for two to three weeks to find the specific foods that affect you.
A practical strategy is to remove the most likely triggers for a week or two, then reintroduce them one at a time. If a food consistently causes symptoms on reintroduction, it’s a confirmed trigger for you. If it doesn’t, there’s no reason to avoid it. This approach is more sustainable than a blanket restriction diet and helps you maintain as varied a diet as possible while keeping symptoms under control.