Stomach acid levels respond to what you eat, when you eat, how you sleep, and whether you use over-the-counter or prescription medications. Most people searching for ways to reduce acidity are dealing with heartburn, acid reflux, or a general burning sensation after meals. The good news: a combination of simple habit changes and, when needed, the right type of medication can bring relief within hours to days.
Why Your Stomach Produces Too Much Acid
Your stomach lining contains specialized cells that pump hydrogen ions into the stomach through what’s called a proton pump. This pump exchanges hydrogen for potassium, creating hydrochloric acid strong enough to break down food and kill bacteria. The process is tightly regulated by hormones and nerve signals, but certain triggers can push acid production into overdrive or cause acid to splash up into the esophagus where it doesn’t belong.
The valve between your esophagus and stomach, called the lower esophageal sphincter, is supposed to close after food passes through. When it relaxes at the wrong time, acid rises into the esophagus and causes that familiar burning. Fatty foods, large meals, and eating too close to bedtime all contribute to this problem, either by increasing acid output or by keeping the valve open longer than it should be.
Foods That Make Acidity Worse
Certain foods cause the esophageal sphincter to relax and slow digestion, letting food sit in the stomach longer and giving acid more opportunity to travel upward. The most common culprits, per Johns Hopkins Medicine, include fried food, fast food, pizza, fatty meats like bacon and sausage, and cheese. These are all high in fat, which takes longer to digest and increases pressure inside the stomach.
Other well-known triggers include citrus fruits, tomato-based sauces, chocolate, coffee, carbonated drinks, and alcohol. You don’t necessarily need to eliminate all of these permanently. Most people find that two or three specific foods are their worst triggers. Keeping a simple food diary for a week or two helps you identify which ones to cut back on rather than overhauling your entire diet at once.
Foods that tend to cause less trouble include vegetables, oatmeal, non-citrus fruits like bananas and melons, lean proteins such as chicken and fish, and whole grains. These are lower in fat, easier to digest, and less likely to provoke the sphincter into relaxing.
Habit Changes That Work Quickly
Stop eating at least three hours before bedtime. There’s a straightforward physical reason for this: lying down with a full stomach allows acid to flow back into the esophagus because gravity is no longer helping keep it down. This single change eliminates nighttime heartburn for many people.
Eating smaller, more frequent meals instead of two or three large ones reduces the total volume of food in your stomach at any given time, which lowers pressure on the sphincter. Eating slowly matters too, since swallowing air with rushed bites increases bloating and upward pressure.
If you get heartburn at night despite the three-hour rule, elevating the head of your bed by about six inches helps. Use a wedge pillow or place blocks under your bed frame. Simply stacking regular pillows doesn’t work well because it bends your body at the waist rather than creating a gentle slope, which can actually increase abdominal pressure.
Tight clothing around the midsection, smoking, and excess weight all put physical pressure on the stomach and push acid upward. Losing even a modest amount of weight often reduces reflux episodes noticeably.
Over-the-Counter Medications Compared
Three main types of acid-reducing medications are available without a prescription, and they work in very different ways with different timelines.
- Antacids (like Tums or Rolaids) neutralize acid that’s already in your stomach. They work within minutes, making them ideal for occasional heartburn after a big meal. The relief is real but short-lived, typically lasting 30 to 60 minutes.
- H2 blockers (like famotidine) reduce acid production by blocking one of the chemical signals that tells your stomach to make acid. They take about 30 minutes to kick in but provide roughly eight hours of relief. These are a good middle-ground option for predictable heartburn, such as taking one before a meal you know will cause trouble.
- Proton pump inhibitors (like omeprazole) directly shut down the proton pumps that produce acid. They’re the most powerful option, reducing stomach acid for 15 to 21 hours a day. The tradeoff is speed: PPIs can take up to four days to reach full effect. They’re designed for frequent heartburn, not the occasional flare-up.
For a one-time episode, an antacid is your fastest fix. For heartburn that hits several times a week, an H2 blocker or PPI makes more sense because they prevent acid rather than just neutralizing it after the fact.
Baking Soda as a Quick Fix
Dissolving baking soda (sodium bicarbonate) in water is a traditional home remedy that genuinely works as an antacid. It neutralizes stomach acid on contact. The maximum safe amount for adults is about five teaspoons of the effervescent powder form per day, but most people use far less: half a teaspoon dissolved in a glass of water.
There are important limits to this approach. Don’t use baking soda for more than two weeks. Don’t take it within one to two hours of other medications, because it can interfere with their absorption. If you’re on a sodium-restricted diet, have high blood pressure, kidney disease, or heart disease, avoid it entirely since it’s very high in sodium and can cause water retention. Don’t combine it with large amounts of milk or dairy products, which increases the risk of side effects. And never give it to children under six unless directed by a doctor.
What About Apple Cider Vinegar?
Despite its popularity online, there is no published research in medical journals supporting the use of apple cider vinegar for heartburn. The common theory is that some people’s reflux is caused by too little acid rather than too much, and that adding vinegar corrects the problem. Harvard Health Publishing has noted that the mechanism controlling the esophageal sphincter is far more complex than stomach acidity alone, involving involuntary muscles, hormones, and neurotransmitters. Adding an acidic liquid to an already irritated esophagus carries obvious risks of making things worse.
Supplements That May Help
Deglycyrrhizinated licorice, commonly called DGL, is a supplement that may increase mucus production in the stomach and esophagus. This extra mucus acts as a protective barrier against acid, potentially allowing irritated tissue to heal and preventing future reflux episodes. A 2014 study confirmed that DGL promotes mucus activity in the digestive tract.
Because the FDA doesn’t regulate licorice supplements, the ingredients, doses, and quality vary widely between brands. If you want to try DGL, look for products from established supplement companies that use third-party testing. Regular licorice (not the deglycyrrhizinated form) can raise blood pressure, so the DGL form is specifically designed to remove that compound.
Long-Term PPI Use: What the Evidence Shows
If you’ve been taking a proton pump inhibitor for months or years, you may have seen alarming headlines about bone fractures, vitamin deficiencies, and kidney problems. The picture is more nuanced than those headlines suggest. The American College of Gastroenterology acknowledges these concerns but points out that higher-quality studies have not confirmed a direct cause-and-effect link between PPI use and osteoporosis-related bone fractures or significant vitamin and mineral deficiencies.
That said, PPIs do reduce acid, and acid plays a role in absorbing certain nutrients. Vitamin B12, magnesium, and calcium all depend partly on stomach acid for absorption. Some studies in specific populations, such as kidney transplant recipients, have found higher rates of low magnesium in PPI users compared to those on H2 blockers. For most people without pre-existing risk factors for bone disease or B12 deficiency, routine monitoring or extra supplementation isn’t necessary. But if you have risk factors for osteoporosis or nutrient deficiencies, it’s worth discussing your PPI use with your doctor to weigh the benefits against any potential concerns.
Red Flags That Need Attention
Most acidity is manageable with the strategies above. But certain symptoms signal something more serious, such as Barrett’s esophagus or other complications. Get evaluated promptly if you have difficulty swallowing, are vomiting blood or material that looks like coffee grounds, notice black or tarry stools, or are losing weight without trying. Chest pain that could be cardiac in nature also warrants immediate medical attention rather than a trial of antacids.