Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Peppermint (Mentha piperita) has a long history of use for various digestive complaints, including indigestion and bloating, and is also supported by some scientific evidence for its effects on gastrointestinal function. The primary mechanism by which peppermint may help with belching (eructation) is its antispasmodic action on the smooth muscles of the gastrointestinal tract, largely attributed to its main active constituent, menthol. Studies have shown that peppermint oil can relax the lower esophageal sphincter and reduce spasms in the gut, which may lead to decreased symptoms of indigestion and bloating—conditions often associated with belching.

However, the evidence specifically addressing peppermint’s efficacy for belching itself is limited and indirect. Most clinical trials and reviews focus on peppermint oil's benefits for irritable bowel syndrome (IBS) and dyspepsia, demonstrating improvements in global digestive symptoms, which can include belching among other complaints. Guidelines from some gastroenterological societies acknowledge peppermint oil as a potential option for functional dyspepsia, but do not specifically highlight its use for belching alone.

Importantly, peppermint oil can relax the lower esophageal sphincter, which in some individuals may actually worsen symptoms of gastroesophageal reflux (GERD), a condition that can also involve excessive belching. Therefore, while there is scientific rationale and modest evidence for peppermint's benefit in digestive comfort, its effect on belching is not robustly established by targeted research. The evidence rating for this use is thus moderate to low.

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