Plantain (Plantago lanceolata), a plant of temperate climate in the northern hemisphere, common in Poland. Its raw medical materials are the leaves of plantain (Folium Plantaginis}, including: enzymes (invert sugar, emulsin), flavonoids, tannins, iridoid glycosides, pectin, minerals (soluble silica, zinc), saponin triterpenes, mucus and vitamins (C, K) . It has a wide medicinal use because it has a protecting and coating effect, it is expectorant, anti-inflammatory, antiviral, diuretic, stimulates gastric juices, antidiarrhoeal, in addition applied externally it accelerates wound healing (e.g. by applying a fresh plantain leaves directly on the wound) and regeneration of the epidermis, used also in conjunctivitis inflammation.