Lungwort tea is rich in flavonoids, tannins, saponines, vitamin C and other useful compounds and nutrients. Health benefits of lungwort tea embrace anti-inflammatory, expectorant, demulcent, slightly diuretic, astringent and other properties of this medicinal herb Preparation: Steep 1 teaspoon of dried leaves in 1 cup of cold water and bring to boil. Turn the heat off. Cover it for 5-10 minutes. Drink 3-4 cups a day.