Peppermint and Spearmint (Mentha species) leaves are loaded with a highly potent essential oil rich in l-menthol, along with rosmarinic acid and flavonoids. Menthol acts as a natural calcium channel blocker in gastrointestinal smooth muscle, triggering a direct spasmolytic effect that relaxes intestinal walls and relieves painful cramping, bloating, and gas. Inhaling its volatile vapors also stimulates nasal receptors to relieve sinus congestion.
Educational information only — never stop or change a prescribed medication without talking to your prescriber first.
Avoid consuming peppermint tea if you suffer from severe acid reflux (GERD) or a hiatal hernia, as menthol relaxes the lower esophageal sphincter, which can worsen heartburn. Do not apply pure essential oil directly to the face of infants or young children.
Evidence level: Strong
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