Sweet Chestnut (Castanea sativa) leaves are rich in tannins, flavonoids, and mucilage compounds, making them distinct from toxic Horse Chestnut seeds. In traditional herbalism, Sweet Chestnut leaf preparations serve as a potent respiratory sedative and expectorant. The active constituents calm spasmodic cough reflexes, soothe inflamed bronchial tissues, and act as a mild astringent to tone relaxed mucous membranes.
Educational information only — never stop or change a prescribed medication without talking to your prescriber first.
Generally safe. High tannin content may cause mild gastric upset if consumed in large quantities on an empty stomach. Avoid during pregnancy unless supervised by a healthcare professional.
Evidence level: Moderate
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