Does apple cider vinegar help with GERD, IBS or ulcers? What the research does and doesn't show

The evidence doesn't support apple cider vinegar for GERD, irritable bowel syndrome or stomach ulcers. A 2025 evidence review of products marketed for GERD rated the evidence behind apple cider vinegar "insufficient," and we haven't found a single controlled human trial testing it for GERD, IBS or ulcers specifically.

What the evidence doesn't support

It doesn't support apple cider vinegar as a way to manage GERD symptoms, and it doesn't support any claim for irritable bowel syndrome or stomach ulcers — no controlled trial testing apple cider vinegar against any of those three conditions exists that we've found. What does exist is a documented case of esophageal injury linked to a vinegar tablet, which points the other way: toward caution around direct acid contact with an already-irritated esophagus, not toward a use case.

What the research covers — and doesn't

A 2025 evaluation in the Journal of Clinical Gastroenterology assessed products marketed on Amazon.com for GERD against published evidence, using a formal evidence-grading framework. High-quality evidence existed for weight loss and specific medications (antacids, H2 blockers, proton pump inhibitors); the review rated the evidence for GERD teas, supplements, apple cider vinegar, probiotics and most diet books as insufficient. That's an assessment of the existing literature, not a new trial — but it reflects the same gap we found searching directly: no controlled trial testing apple cider vinegar against GERD symptoms.

For irritable bowel syndrome and stomach ulcers, we searched specifically and found no controlled human trial of apple cider vinegar for either condition. What does exist, from the safety literature, is a case report of a documented esophageal injury following use of a vinegar tablet — a lab evaluation prompted by that case went on to test eight commercial apple cider vinegar tablet products and found considerable variability in pH and acid content between brands. That's a safety finding about direct acid exposure, not a controlled study of GERD, IBS or ulcers as outcomes.

Questions people ask

Is apple cider vinegar good for GERD?

A 2025 evidence review of GERD-marketed products rated apple cider vinegar's supporting evidence insufficient, in the same category as most other diet-based GERD remedies reviewed. We haven't found a controlled trial testing it directly.

Can apple cider vinegar cause GERD, or an injury like it?

We haven't found a study establishing that apple cider vinegar causes GERD specifically. A documented case report described an esophageal injury following use of a vinegar tablet, which is a related but distinct concern — direct, concentrated acid contact with the esophagus, regardless of whether GERD is present.

Is apple cider vinegar good for irritable bowel syndrome?

We haven't found a controlled trial testing apple cider vinegar for IBS. There's nothing in the published research to answer this one either way.

Can apple cider vinegar cause stomach ulcers?

We haven't found a study testing whether apple cider vinegar causes stomach ulcers. Given that it's an acid, undiluted or excessive intake is a reasonable thing to avoid on general safety grounds, covered further in apple cider vinegar side effects, but that's a general caution, not a documented ulcer finding specifically.

When to talk to a doctor

Persistent heartburn, diagnosed GERD, IBS symptoms or suspected ulcers are all reasons to see a doctor rather than try a home remedy first — GERD in particular can share symptoms with more serious conditions that are worth ruling out. Apple cider vinegar is not a treatment for any of these, and if you have diagnosed GERD, IBS or an ulcer, or take medication for any of them, talk to your doctor before adding it.

Related reading: apple cider vinegar side effects, who should not take apple cider vinegar, and apple cider vinegar and inflammation: what the research does and doesn't show.