Marshmallow root is composed of flavonoids, starch, phenolic acids and coumarins. The polysaccharides of marshmallow are immunostimulating, anti-inflammatory, antioxidant and soothing substances. The marshmallow root also has an antitussive effect, thanks to the action of its mucilages, and a soothing effect. It can also be used in cases of cystitis and diarrhea.