Water is the single best drink for acid reflux, and the worst offenders are coffee, soda, and other carbonated or caffeinated beverages. But beyond that simple answer, the specifics matter: what temperature, how much at once, and which alternatives actually help rather than just sound healthy. Here’s what the evidence supports.
Water Is the Gold Standard
Plain water is the safest, most effective drink for people with acid reflux. It dilutes stomach acid, doesn’t irritate the esophagus, and has zero effect on the muscle that keeps acid from rising into your throat. In contrast, every carbonated beverage tested in clinical studies reduced the strength of that muscle (the lower esophageal sphincter) by 30 to 50%. In 62% of cases, the reduction was severe enough to reach a level doctors would diagnose as incompetent. Tap water caused no reduction at all.
A large prospective study of over 48,000 women found that replacing just two daily servings of coffee, tea, or soda with water was associated with a reduced risk of reflux symptoms. Water works partly because of what it isn’t: no carbonation, no caffeine, no acid.
Alkaline Water May Offer Extra Protection
Not all water is equal when it comes to reflux. Standard tap and bottled water typically has a pH between 6.7 and 7.4, which isn’t high enough to neutralize pepsin, the digestive enzyme that damages your esophagus and throat when it splashes up with stomach acid. Pepsin stays stable and can be reactivated at those pH levels.
Water with a pH of 8.8, however, permanently inactivates pepsin on contact. A study published in the Annals of Otology, Rhinology & Laryngology found that alkaline water at this pH irreversibly destroyed human pepsin in lab testing and had far greater acid-buffering capacity than conventional water. This makes it a potentially useful addition for people with reflux that affects the throat (sometimes called silent reflux or laryngopharyngeal reflux). Look for naturally alkaline or bicarbonate-rich mineral water, which you can find at most grocery stores.
Low-Fat and Plant-Based Milks
Milk has a complicated reputation in the reflux world. Full-fat dairy can trigger symptoms because saturated fat slows stomach emptying and relaxes the sphincter that holds acid down. But low-fat milk actually helps coat the esophagus and buffer stomach acid, providing short-term relief similar to low-fat yogurt.
If dairy doesn’t agree with you, plant-based milks are solid alternatives. Almond milk, oat milk, soy milk, and cashew milk are all naturally low in fat and non-acidic. Almond milk in particular tends to be slightly alkaline, which gives it a mild buffering effect. Just watch out for flavored or sweetened versions, which can contain added ingredients that may aggravate symptoms.
Ginger Tea
Ginger has real physiological benefits for reflux, not just folk wisdom. Gingerol, the active compound in ginger root, speeds up gastric motility, meaning food leaves your stomach faster instead of sitting there and pushing acid upward. The longer food lingers in your stomach, the more opportunity there is for reflux, so anything that moves digestion along helps.
Brewing fresh ginger root in hot water makes a simple, caffeine-free tea. Use about an inch of sliced ginger per cup. Keep in mind that commercially packaged “ginger teas” vary widely. Some contain very little actual ginger and may include citric acid or other additives. Fresh is best, and you don’t need much to get the benefit.
Aloe Vera Juice
Aloe vera juice has shown promise in small clinical trials. In one randomized controlled study, participants who took 10 milliliters per day of aloe vera syrup (about two teaspoons) experienced improvements in reflux symptoms. Aloe vera has natural anti-inflammatory properties and may help soothe an irritated esophageal lining. If you try it, use products specifically labeled for internal consumption and look for decolorized, purified versions, since whole-leaf aloe contains compounds that act as laxatives.
What to Avoid and Why
Coffee is the biggest culprit among common beverages. In the Nurses’ Health Study II, women who drank more than six servings per day had a 34% higher risk of developing weekly reflux symptoms compared to non-drinkers. Tea and soda showed similar patterns, with 26% and 29% increased risk respectively. Interestingly, the results held even when researchers separated caffeinated from decaffeinated versions, suggesting that caffeine isn’t the only problem. Coffee and tea contain other compounds that stimulate acid production.
Carbonated drinks are a double threat. The carbon dioxide gas distends your stomach, which weakens the sphincter, and many sodas are highly acidic on top of that. Citrus juices like orange and grapefruit juice are also strongly acidic and can directly irritate an already-inflamed esophagus. Alcohol relaxes the sphincter and increases acid secretion, making it one of the most reliable reflux triggers.
Skip the Apple Cider Vinegar
Apple cider vinegar is one of the most popular home remedies for heartburn online, but there is zero published clinical evidence supporting it. As Harvard Health Publishing noted, no research in any medical journal has tested raw apple cider vinegar for heartburn. The logic behind it (that reflux is caused by too little stomach acid) isn’t supported by gastroenterology research. Vinegar is acidic, with a pH around 2 to 3, and adding more acid to an already irritated esophagus can make things worse.
How You Drink Matters as Much as What
Volume and timing play a surprisingly large role. A study of GERD patients found that consuming 600 mL (about 20 ounces) of liquid at meals produced significantly more reflux episodes than consuming 300 mL (10 ounces). The larger volume group had nearly twice as many reflux events (17 versus 10) and more than double the total acid exposure time. The takeaway: sip smaller amounts more frequently throughout the day rather than gulping large volumes with meals.
Temperature also matters, but in one direction. Research shows that acid exposure sensitizes the esophagus specifically to heat, not cold. After acid irritation, subjects could tolerate only about a third of the heat they normally could, and sensations shifted from warmth to burning. This means very hot drinks like scalding coffee or tea can feel significantly worse if your esophagus is already inflamed. Warm or room temperature beverages are a safer bet. Cold drinks don’t appear to cause the same problem.
A Quick Reference
- Best choices: plain water, alkaline water (pH 8.8), low-fat milk, unsweetened almond or oat milk, ginger tea, aloe vera juice
- Use with caution: decaffeinated coffee, herbal teas with citrus ingredients, flavored waters with added acid
- Avoid or limit: regular coffee, carbonated drinks, alcohol, citrus juice, full-fat milk, apple cider vinegar
Keep portions to around 10 ounces per sitting, drink between meals when possible, and let hot beverages cool to a comfortable temperature before drinking. These small adjustments often reduce symptoms as much as changing what you drink in the first place.