You can control stomach acid through a combination of eating habits, body positioning, and, when needed, over-the-counter or prescription medications. Your stomach naturally produces acid at a pH of 1.5 to 2.0, which is strong enough to break down meat and kill bacteria in food. The problem isn’t the acid itself but where it goes: when acid escapes upward into the esophagus, it causes heartburn, regurgitation, and discomfort. Most strategies for controlling acid focus on keeping it where it belongs or reducing how much your stomach produces.
How Stomach Acid Escapes
A ring of muscle at the top of your stomach, called the lower esophageal sphincter, acts as a one-way valve. It opens when you swallow and closes between meals to keep acid contained. In people with acid reflux, this valve relaxes too often or at the wrong times, letting acid splash into the esophagus. The frequency of these unwanted relaxations is influenced by what you eat, how much you eat, your body weight, and certain medications.
Overeating is one of the most common triggers. When your stomach stretches from a large meal or swallowed air, it signals the valve to open more frequently. This is why smaller, more frequent meals tend to cause less reflux than two or three large ones.
Foods That Make Acid Reflux Worse
High-fat meals, alcohol, chocolate, and carbonated beverages all reduce the pressure your esophageal valve can maintain, making it easier for acid to escape. Fatty foods are particularly problematic because they slow digestion, keeping your stomach full and distended for longer. Switching to lean protein sources like skinless poultry, fish, or tofu can noticeably reduce symptoms for many people.
Acidic foods like citrus and tomatoes don’t necessarily increase acid production, but they can irritate an already inflamed esophagus. Spicy foods work similarly. If you notice a pattern with specific foods, it’s worth eliminating them for a few weeks to see if symptoms improve. Coffee is a common culprit, though tolerance varies widely from person to person.
Timing Your Last Meal
One of the most effective and underused strategies is simply waiting longer between dinner and bedtime. People who lie down less than three hours after eating are roughly 7.5 times more likely to experience reflux symptoms compared to those who wait four hours or more. When you’re upright, gravity helps keep acid in your stomach. When you lie flat with a full stomach, that advantage disappears.
If your schedule makes early dinners difficult, try making your evening meal the lightest of the day. A smaller volume of food means less stomach distension and fewer signals for that valve to relax.
Sleep Position and Head Elevation
Raising the head of your bed by 15 to 25 centimeters (about 6 to 10 inches) using wedge pillows or bed risers reduces nighttime acid exposure. Studies have tested foam wedges angled at 20 to 22 degrees, and bed legs raised on 20-centimeter blocks, both with positive results. Stacking regular pillows doesn’t work as well because it bends your body at the waist rather than creating a gradual incline from the hips up, which can actually increase abdominal pressure.
How Body Weight Affects Acid
Excess abdominal fat increases the pressure inside your abdomen, physically squeezing the stomach and pushing acid upward. Research has found an 85% increase in the risk of reflux symptoms when comparing people with smaller versus larger abdominal diameters, independent of overall body weight. This means that even modest reductions in belly fat can relieve symptoms. If you carry weight around your midsection, losing even a few inches of waist circumference may help more than any dietary tweak.
Tight clothing around the waist, including belts and shapewear, can create a similar effect on a smaller scale by compressing the abdomen.
Simple Habits That Help
Chewing sugar-free gum for 30 minutes after a meal is a surprisingly effective strategy. It stimulates saliva production and increases how often you swallow, which clears acid from the esophagus faster. One study found that postmeal gum chewing cut the time the esophagus was exposed to acid nearly in half.
Ginger may also help by speeding up how quickly your stomach empties. In healthy volunteers, ginger cut gastric emptying time roughly in half, from about 27 minutes to 13 minutes. A faster-emptying stomach means less distension and fewer opportunities for acid to reflux. Fresh ginger in tea or meals is the simplest way to incorporate it, though ginger supplements are also available.
Over-the-Counter Medications
Three types of acid-reducing medications are available without a prescription, and they work differently.
- Antacids (like calcium carbonate or magnesium hydroxide) neutralize acid that’s already in your stomach. They work within minutes but wear off quickly, typically lasting 30 to 60 minutes. Best for occasional, predictable symptoms.
- H2 blockers (like famotidine) reduce acid production by blocking one of the chemical signals that tells your stomach to make acid. They take 30 to 60 minutes to kick in and suppress acid for about four hours. Good for preventing symptoms you can anticipate, like after a heavy meal.
- Proton pump inhibitors, or PPIs (like omeprazole) block the acid-producing pumps in your stomach lining directly. They’re the most powerful option, maintaining reduced acid levels for 15 to 22 hours per day compared to just four hours with H2 blockers. They need to be taken before a meal, and it takes a few days of consistent use to reach full effect.
For persistent symptoms, gastroenterology guidelines recommend an eight-week trial of a PPI taken once daily before a meal. If symptoms resolve, the goal is to step down to the lowest effective dose or switch to an as-needed approach.
Risks of Long-Term Acid Suppression
PPIs are safe for short-term use, but taking them for a year or longer has been linked to deficiencies in several nutrients your body needs acid to absorb properly. Vitamin B12 is the most studied concern. One study found that long-term PPI users were over four times more likely to develop B12 deficiency compared to non-users. B12 deficiency can cause fatigue, numbness, and cognitive changes that develop gradually and are easy to miss.
Iron absorption also suffers. Chronic PPI use has been associated with a fivefold increase in the odds of declining hemoglobin levels. Magnesium depletion is another risk, prompting an FDA warning in 2011 for anyone on PPIs for longer than a year. Calcium absorption is affected too, which has raised concerns about bone density over time.
None of this means you should avoid PPIs if you need them. It means that if you’ve been taking one daily for months or years, it’s worth checking your nutrient levels periodically and discussing with a provider whether you still need the full dose. Many people can taper down or switch to H2 blockers after their initial symptoms are controlled, using lifestyle changes to fill the gap.