Coffee and Acid Reflux: Only a Small Risk (2026 Study)

Yes, you can drink coffee with acid reflux if it doesn't give you heartburn. A 2026 meta-analysis of 40 studies and 122,074 adults found reflux in 34.9% of coffee drinkers and 30.7% of non-drinkers, about 4 people in every 100. If coffee burns, halve it and see whether your symptoms ease.

Does coffee really cause acid reflux?

Coffee is linked to reflux, but only slightly. Doctors at Brigham and Women's Hospital and Harvard Medical School pooled 40 studies from Europe, East Asia, the United States and the Middle East, covering 122,074 adults.

Reflux affected 34.9% of coffee drinkers and 30.7% of non-drinkers, a gap of about 4 people in every 100. The authors call the difference small.

People drinking at least one cup a day were not clearly worse off than those drinking less, and coffee showed no link to Barrett's esophagus, a complication of long-term reflux.

The 12 East Asian studies, from places such as China, Japan, South Korea and Taiwan, showed a stronger link than other regions. The authors suggest brewing style, what people add to coffee and when they drink it may explain the gap.

Why does coffee give some people heartburn?

Coffee relaxes the valve at the bottom of the esophagus, and caffeinated coffee makes the stomach release more acid than decaf. With a looser valve and more acid, acid moves up more easily. For more on caffeine, see why coffee wakes you up.

Two small trials that measured acid in the esophagus for three hours found more reflux episodes after coffee. Bodies differ, though: some people drink coffee every morning with no symptoms, others feel the burn after one cup.

Is coffee on an empty stomach worse than after a meal?

No study has shown that coffee on an empty stomach causes more reflux than coffee after food. This meta-analysis did not look at timing, and the authors list it as a question for future research.

A study that measured valve pressure found coffee relaxed it both alone and with a meal, so eating first does not always prevent heartburn. If a slice of toast before your coffee makes you feel better, keep doing it.

If you drink coffee before a morning run and feel heartburn mid-run, try a smaller cup first. Research on coffee before exercise shows a modest dose of caffeine already helps; see coffee before exercise: how much helps.

What should I do if coffee gives me heartburn?

Go by your own symptoms. The authors advise cutting coffee only for people who clearly see it triggering symptoms and feel better when they drink less, so not everyone with reflux needs to quit.

Option one: if coffee gives you no heartburn or sour burps, keep drinking it as usual.

Option two: if it burns, halve your coffee or pause it for a few days and note your symptoms on your phone. If they clearly improve, coffee is one of your triggers.

Option three: for night-time heartburn, raise the head of your bed and cut back on alcohol. The authors note these steps have stronger evidence than avoiding coffee.

If heartburn is frequent, swallowing is difficult, or antacids do not help, see a doctor.

If coffee sits well with you, every coffee in Preda Roasting House's Specialty range brews well as drip. For an easy-drinking cup, try SCM, a light roast whose sweetness is balanced by bright, fresh, fruity acidity.

If you are down to one cup a day, make it the one you enjoy most, such as an iced Americano made with a medium-roast House Blend like Fullcity or Simply Sweet at Go+ Café Lampang.

What are the limits of this study?

Most of the pooled studies were one-off surveys (33 of 43), so they show coffee is associated with reflux but cannot prove it causes it. More than half (25 of 43) were at high risk of bias, results varied a lot, definitions of a cup and of reflux differed, and only a few small trials measured acid directly, for just 13 hours.

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