Vervain: benefits, dosage, contraindications

Common vervain belongs to the family Verbenaceae. This perennial plant, native to temperate regions, measures between 40 and 80 cm. The aerial parts, harvested during flowering, are used in herbal medicine. Among its main constituents are iridoids such as verbenaline and hastatoside, known for their soothing and anti-inflammatory properties. The plant is also rich in polyphenols, notably verbascoside, which is highly concentrated and plays a crucial role as an antioxidant. The flavonoids include apigenin and artemetin. Finally, the presence of triterpenes and steroids is noted, such as ursolic acid and beta-sitosterol. Historically, vervain was considered a sacred plant in Europe, its name possibly derived from Old Celtic. It was traditionally used for a multitude of ailments, notably cramps, fatigue, nervous disorders, as well as digestive problems. Despite its varied traditional uses, Commission E has deemed its use not recommended due to insufficient evidence of its effectiveness.