Composition: Oak bark. Pharmacological properties: oak bark contains tannins (up to 29%), flavonoids (quercetin, etc.), gallic and elagovic acids (up to 1.6%), flobafen, pentosans (up to 14%), pectins (up to 6%), sugars, mucus, protein substances, starch, mineral substances and has astringent, anti-inflammatory, anti-rotten properties.
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