Gastroesophageal reflux disease (GERD) is the backflow of acidic stomach contents into the esophagus. Retrosternal burning (heartburn), acid regurgitation, the sensation of food rising back up—these symptoms affect 20% of Italian adults at least once a week. Many rely chronically on proton pump inhibitors (PPIs) without ever addressing the modifiable dietary and behavioral causes that contribute to the problem.

The mechanism of reflux: why it happens

The lower esophageal sphincter (LES) is a ring-shaped muscle that separates the esophagus from the stomach. Under normal conditions it stays closed: it opens only to let food pass downward and gases pass upward. In reflux, the LES relaxes inappropriately or fails to close completely: gastric acid rises into the esophagus, causing irritation (the esophageal lining lacks the protective coating of gastric mucosa).

Factors that weaken the LES or increase gastric pressure: certain foods (mint, chocolate, alcohol, fats, coffee), excess food in the stomach (large meals), being overweight (abdominal pressure increases reflux), pregnancy, certain medications (calcium channel blockers, nitrates, beta-agonists).

Foods that worsen reflux: what to reduce

Foods that relax the LES: mint and peppermint oil (surprisingly, mint is one of the main triggers), chocolate (methylxanthines and fats), alcohol (ethanol directly relaxes the LES), excessive coffee and tea (caffeine and theophylline). Foods that increase gastric acidity: citrus fruits and citrus juices (citric acid), tomatoes and tomato-based sauces (citric and malic acid), excess vinegar, spicy seasonings (chili peppers, black pepper in large amounts). Foods that slow gastric emptying by increasing pressure: high-fat meals, fried foods, very large meals.

Foods and beverages that help with reflux

Bicarbonate water: bicarbonate buffers gastric acid. A glass of water with natural bicarbonate (or half a teaspoon of food-grade baking soda in water) can relieve acute heartburn better than many antacids. Ginger in moderate doses: it has anti-inflammatory effects on the esophagus and prokinetic properties that accelerate gastric emptying, reducing reflux risk. Sodium alginate (found in certain brown algae and some natural remedies): forms a floating "plug" over gastric acid that physically prevents backflow. Soluble fiber: oatmeal, flaxseeds, processed aloe vera: form a protective coating on the esophageal lining. Lean proteins (chicken, fish, egg whites): partially neutralize gastric acid and don't slow gastric emptying the way fats do.

The Mediterranean diet and reflux: a protective association

A study published in JAMA Internal Medicine in 2017 compared a plant-based Mediterranean diet with PPIs (proton pump inhibitors, the most commonly used anti-acid medications) for managing reflux. The results: the Mediterranean diet reduced reflux symptoms in 62% of patients, PPIs in 54%. This isn't a reason to avoid medications when necessary, but it's solid evidence that diet has a real effect on the disease.

Behavioral habits that matter as much as diet

Don't lie down for at least two hours after eating: gravity helps keep stomach contents in the stomach. Elevate the head of your bed by 15-20 cm: in people with nighttime reflux, this simple change significantly reduces nighttime symptoms. Avoid large evening meals: your stomach should be as empty as possible when you lie down. Quit smoking if you smoke: nicotine relaxes the LES. Reduce excess weight if present: even a 5-10% reduction in body weight significantly reduces reflux in overweight individuals.

Your personal reflux trigger diary

Reflux triggers vary significantly from person to person. Keep a diary for two weeks: for each episode of heartburn or regurgitation, note the time, what you ate in the three hours before, your position (sitting, lying down, active), and stress level. Your specific triggers will emerge. Many people discover their trigger isn't tomato (often blamed) but coffee after dinner, or large meals late in the evening, or mint.

Practical changes to your evening meal

Evening habits are most important for reflux. Light dinner (less than 500 kcal): reduces gastric pressure during sleep. Eat dinner at least three hours before bed: your stomach should have nearly completed emptying. Avoid: coffee after 6 PM, alcohol, chocolate, mint, large and fatty meals. Prefer: lean proteins (fish, chicken), cooked vegetables, whole grains, ginger tea to end your evening.

Baking soda as a quick acute remedy

For occasional acute heartburn, before reaching for over-the-counter antacids: dissolve half a teaspoon of food-grade baking soda in 200 ml of water. Baking soda buffers acid in minutes. Don't use it regularly (it contains a lot of sodium) but it's a safe and immediate remedy for isolated episodes. Baking soda in natural waters (such as some bicarbonate-calcium waters) has the same effect in milder form with additional digestive benefits.

When PPIs are necessary and how to use them correctly

Proton pump inhibitors (omeprazole, lansoprazole, pantoprazole) are effective medications for reflux. But long-term use isn't without consequences: reduced absorption of magnesium, vitamin B12, calcium, increased risk of Clostridium difficile intestinal infections. If you take PPIs chronically, discuss with your doctor: often it's possible to reduce the dose or stop the medication with the dietary and behavioral changes described. Don't stop PPIs on your own after prolonged use: it can cause acid rebound.