Several common foods can help neutralize or buffer stomach acid, offering relief from heartburn and acid reflux without reaching for an antacid. The most effective options are naturally alkaline foods (with a pH closer to neutral 7), high-fiber foods that absorb excess acid, and certain watery vegetables and fruits that dilute stomach contents. Here’s what works and why.
How Foods Neutralize Acid
Your stomach normally sits at a pH between 1.5 and 3.5, which is highly acidic. When that acid splashes up into your esophagus, you feel the burn. Foods help in a few different ways: some have a naturally higher pH that directly buffers acid, some contain compounds like pectin or fiber that absorb acid and coat your stomach lining, and others simply dilute the acid concentration by adding volume and water content to your stomach.
No food will bring your stomach to a perfectly neutral pH, and you wouldn’t want that since acid is essential for digestion. The goal is to reduce the intensity enough to stop the burning.
Bananas and Melons
Bananas are one of the most reliable foods for calming acid reflux. They contain both pectin, a soluble fiber that helps coat the stomach and esophageal lining, and high levels of potassium that help neutralize stomach acid. Green (less ripe) bananas also contain resistant starch, a type of carbohydrate that produces less gas than other fibers, so you’re less likely to feel bloated afterward.
Melons are similarly effective. Cantaloupe has a pH of about 6.3, and honeydew sits in the same range, making both of them close to neutral. Their high water content also helps dilute stomach acid. Watermelon works well too, though it’s slightly more acidic than cantaloupe or honeydew. Any of these make a solid snack when heartburn hits, or a good breakfast choice if mornings tend to be your worst time for reflux.
Vegetables With High Water Content
Cucumbers, celery, lettuce, and zucchini are all low in acid and high in water, which makes them gentle on an irritated stomach. Cauliflower and fennel are specifically noted by Johns Hopkins Medicine as alkaline foods that help with acid reflux. Fennel has an additional benefit: it can help relax the smooth muscle in your digestive tract, which may reduce the spasms that push acid upward.
Root vegetables like sweet potatoes, carrots, and beets are also good choices. They’re starchy enough to absorb some acid, mildly alkaline, and unlikely to trigger reflux the way tomatoes, onions, or peppers can.
Oatmeal and Whole Grains
Oatmeal is often the first food recommended for people dealing with chronic acid reflux. It’s high in soluble fiber, which absorbs liquid in the stomach and forms a gel-like consistency that can help keep acid from splashing upward. A bowl of plain oatmeal in the morning can set a calmer baseline for your stomach for the rest of the day.
Brown rice, whole wheat bread, and couscous work in similar ways. The key is that whole grains absorb acid and move through your digestive system at a steady pace, preventing the kind of stomach emptying delays that make reflux worse. Refined grains like white bread technically work too, but whole grains keep you fuller longer, which means you’re less likely to overeat at the next meal and trigger another round of heartburn.
Nuts
Almonds, cashews, and walnuts are alkaline foods that can help buffer stomach acid. They also contain healthy fats and fiber, which slow digestion in a way that’s generally beneficial for reflux (unlike high-fat fried foods, which slow digestion while also relaxing the valve between your stomach and esophagus). A small handful of almonds between meals is a common home remedy for mild heartburn, and there’s good reason it works: they’re alkaline, absorbent, and low in moisture, so they soak up some of the excess acid in your stomach.
Stick to raw or dry-roasted varieties. Flavored, salted, or oil-roasted nuts can introduce irritants that cancel out the benefit.
Yogurt and Low-Fat Dairy
Yogurt, particularly varieties containing probiotics, may help reduce acidity and regulate bowel function. It’s also a source of protein and can offer a cooling sensation that relieves discomfort. Non-fat or low-fat versions are generally the safer choice, since full-fat dairy can slow stomach emptying and worsen reflux in some people.
Interestingly, a 2022 study found that increasing dairy intake to three servings per day (whether high-fat or low-fat) didn’t significantly affect reflux symptoms either way. So yogurt is unlikely to make things worse, and the probiotic content may offer a modest benefit, but it’s not a strong neutralizer on its own. Think of it as a good complement to other foods on this list rather than a standalone fix.
Ginger
Ginger has natural anti-inflammatory properties and has been used for centuries to calm upset stomachs. It works best in small amounts: a few slices of fresh ginger steeped in hot water as a tea, or grated ginger added to a stir-fry or smoothie. The compounds in ginger help speed up stomach emptying, which means acid spends less time sitting around with nowhere to go but up.
Don’t overdo it, though. Large amounts of ginger can actually irritate the stomach lining and have the opposite effect. A teaspoon or two of fresh ginger per serving is a reasonable amount.
Alkaline Water
Water with a pH of 8.8 or higher does more than just dilute stomach acid. A study published in the Annals of Otology, Rhinology, and Laryngology found that pH 8.8 alkaline water permanently inactivated pepsin, the digestive enzyme responsible for much of the damage acid reflux causes to your throat and esophagus. Regular tap water doesn’t have this effect. The alkaline water’s acid-buffering capacity also far exceeded that of conventional water.
This doesn’t mean you need to drink alkaline water all day. But sipping it during or after a meal, especially one that tends to trigger reflux, can provide an extra layer of protection beyond what plain water offers.
Foods That Make Things Worse
Knowing what to eat is only half the picture. Certain foods actively increase stomach acid production or relax the valve at the top of your stomach, making reflux more likely. The most common culprits are citrus fruits, tomatoes and tomato-based sauces, chocolate, coffee, alcohol, fried foods, and anything with a lot of black pepper or chili. Carbonated drinks are also a frequent trigger because the gas increases pressure inside your stomach.
Peppermint, despite its reputation as a stomach soother, actually relaxes the lower esophageal sphincter and can make acid reflux worse. If you’ve been drinking peppermint tea for heartburn, try switching to ginger tea instead.
Timing and Portions Matter
Even the most alkaline food won’t help much if you eat a large meal right before lying down. Gravity is your ally when it comes to keeping acid in your stomach. Eating smaller meals throughout the day puts less pressure on the valve between your stomach and esophagus than three large ones. Finishing your last meal at least two to three hours before bed gives your stomach time to empty before you go horizontal.
If nighttime reflux is your main problem, keeping a banana or a few crackers on your nightstand can help. Eating a small amount of something absorbent and alkaline before bed can coat your stomach just enough to get through the night.