Peppermint is described as a carminative herb---one that has a soothing effect on the gastrointestinal tract, relieving symptoms of gas and bloating. The leaves of peppermint are used to extract its volatile oil, which contains menthol and menthone, states the University of Michigan Health System. You're probably more familiar with peppermint tea than you are with peppermint's less familiar preparations, which include enteric-coated peppermint oil capsules.
Preparation
Peppermint oil capsules that are "enteric-coated" are covered with a substance that allows the supplement to pass through your stomach to your small intestine before the coating dissolves. The University of Maryland Medical Center states that enteric-coated peppermint oil supplements contain 0.2ml of oil per capsule.
Use
One suggested use for enteric-coated peppermint oil capsules includes irritable bowel syndrome, or IBS, but they may also be used for indigestion and other symptoms, such as flatulence and bloating. Purportedly, peppermint soothes the spasms of the stomach muscles, making it easier for food to digest, explains UMMC.
Dosage
Enteric-coated peppermint oil capsules are typically taken three times daily, right before meals, according to the Natural Standard, an international research collaboration that aggregates and synthesizes data on complementary and alternative therapies.
Efficacy
The effectiveness of peppermint oil in reducing symptoms of indigestion and IBS is yet to be determined. The Natural Standard states that preliminary evidence indicates that it may reduce symptoms of indigestion and IBS, particularly when combined with oil of caraway, another carminative herb. However, more randomized, placebo-controlled trials are needed to establish peppermint as an effective way to address indigestion and IBS.
Cautions
Peppermint oil is generally considered safe when taken in minute dosages, reports the National Center for Complementary and Alternative Medicine. Possible side effects include allergic reactions and heartburn, with the enteric coating used as a preventive measure against the latter. Avoid peppermint if you're pregnant, notes the Natural Standard. Don't give enteric-coated capsules to children. Peppermint oil is also not advised for people with gallbladder disorders or a type of chronic indigestion called gastroesophageal reflux disease, or GERD, as it can make symptoms even worse.
FDA Classification
Peppermint oil is classified as a dietary supplement by the U.S. Food and Drug Administration. Dietary supplements cannot purport to treat or cure a specific medical condition, nor is the quality of your product guaranteed. Before using enteric-coated peppermint oil capsules to address your health concerns, speak with your physician.
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