You can decrease stomach acid through a combination of dietary changes, sleep positioning, breathing exercises, over-the-counter medications, and avoiding specific trigger foods. The right approach depends on whether you’re dealing with occasional heartburn or a chronic problem, and surprisingly, some people who think they have too much acid actually have too little.
Foods and Drinks That Increase Acid Exposure
Several common foods don’t just irritate your stomach directly. They physically weaken the muscular valve between your esophagus and stomach, called the lower esophageal sphincter, letting acid splash upward. Coffee (both regular and decaf) and other caffeinated drinks relax this valve. So do chocolate, peppermint, garlic, and onions. Fatty, spicy, or fried foods have a double effect: they relax the valve and slow stomach emptying, which means food and acid sit in your stomach longer than usual.
Chocolate is a particularly common culprit because it contains a compound from the cocoa plant that acts similarly to caffeine on that valve. If you’re dealing with frequent acid issues, cutting back on these foods for two to three weeks and then reintroducing them one at a time can help you identify your personal triggers.
Sleep Position and Meal Timing
Sleeping on your left side is one of the simplest and most effective changes you can make. When you lie on your left side, your esophagus and its muscular ring sit higher than your stomach, so acid drains away from the opening more quickly than in other positions. Sleeping on your right side or flat on your back does the opposite, making it easier for acid to pool near the valve.
Elevating the head of your bed by about six inches (using a wedge pillow or blocks under the bed frame) adds gravity to your side. Eating your last meal at least two to three hours before lying down gives your stomach time to empty, reducing the volume of acid available to reflux while you sleep.
Breathing Exercises That Strengthen Your Reflux Barrier
This one surprises most people. A ring of muscle in your diaphragm wraps around the base of your esophagus and acts as a secondary anti-reflux barrier. Like any skeletal muscle, it can be strengthened through targeted exercise. A meta-analysis published in Annals of Palliative Medicine found that diaphragmatic breathing exercises significantly increased pressure at the lower esophageal sphincter in people with GERD, improving the effectiveness of drug therapy as well.
The technique is straightforward: sit or lie comfortably, place one hand on your chest and one on your belly, and breathe slowly so that only your belly hand rises. Inhale for four seconds, hold briefly, and exhale for six to eight seconds. Practicing for 10 to 15 minutes daily over several weeks builds enough diaphragm strength to make a measurable difference. The goal is always the same: train the diaphragm to contract more firmly around the esophagus, creating a tighter seal against acid.
Over-the-Counter Options
Three categories of medication reduce stomach acid, and they work at different speeds and durations.
- Antacids (calcium carbonate, magnesium hydroxide) neutralize acid that’s already in your stomach. They work within minutes but wear off in one to two hours. Good for occasional, predictable heartburn.
- H2 blockers (famotidine) reduce the amount of acid your stomach produces by blocking one of the chemical signals that tells acid-producing cells to turn on. They take 30 to 60 minutes to kick in but last 6 to 12 hours.
- Proton pump inhibitors (omeprazole, lansoprazole) shut down the acid pumps in your stomach lining directly. They’re the most powerful option. The standard over-the-counter dose of omeprazole is 20 mg once daily, taken before a meal, for up to 14 days at a time.
PPIs need a day or two to reach full effect because they work by permanently disabling active acid pumps. Your body makes new pumps continuously, which is why you take one dose each morning. They’re designed for short courses of self-treatment, not indefinite daily use.
Baking Soda as a Quick Fix
Baking soda (sodium bicarbonate) is a legitimate antacid that works by chemically neutralizing hydrochloric acid in your stomach. The standard dose is half a level teaspoon dissolved completely in four ounces of water. That single dose contains 716 mg of sodium, which is roughly a third of the daily recommended limit, so it’s not appropriate for anyone on a sodium-restricted diet or as a regular habit.
One important safety note: the powder must be fully dissolved before drinking. Taking it when you’re overly full from food or drink can cause dangerous gas buildup in the stomach. It’s a reasonable option for occasional, unexpected heartburn, not a daily strategy.
Risks of Suppressing Acid Long-Term
Your stomach acid exists for good reasons. It breaks down protein, kills harmful bacteria in food, and helps your body absorb key nutrients. When acid is suppressed for months or years, some of those functions suffer. A cohort study found that long-term PPI users were roughly 50% more likely to develop vitamin B12 deficiency, with men between 18 and 40 particularly affected. More than half the men in the PPI group had low B12 levels. Long-term acid suppression has also been linked to reduced absorption of magnesium, calcium, and iron.
This doesn’t mean PPIs are dangerous for a two-week course to heal irritated tissue. It means that if you find yourself relying on acid-suppressing medication for months, it’s worth investigating the underlying cause rather than continuing to suppress the symptom.
When the Problem Is Too Little Acid, Not Too Much
Here’s something that trips up a lot of people: low stomach acid can produce symptoms nearly identical to high stomach acid. Bloating, gas, heartburn, reflux, abdominal pain, and even undigested food in your stool can all result from insufficient acid production, a condition called hypochlorhydria. According to Cleveland Clinic, many Americans attribute their digestive symptoms to excess acid and take medication to suppress it, when the real issue is the opposite.
The mechanism is counterintuitive. When your stomach doesn’t produce enough acid, food sits and ferments, creating gas bubbles that rise into your esophagus and carry small amounts of acid with them. Even trace amounts of acid in your throat feel like too much. If you’ve been taking antacids or PPIs without lasting relief, or if your symptoms include persistent bloating and poor digestion alongside reflux, low acid is worth considering as a possibility with your healthcare provider. Suppressing acid further in this situation makes the root problem worse.