Althaea officinalis is a plant that contains several phytochemicals, including phytosterols, flavonoids, and polysaccharides.[1][2][3][4][5] The roots, flowers, and leaves of Althaea officinalis are used in traditional herbal medicine to treat a variety of problems, including coughs and colds.[6] Cough syrups that contain Althaea officinalis extracts (e.g., Phytohustil) are available in some countries.[7][8]
Althaea officinalis is also known as “marshmallow”,[6][9][10][5][11][12][13] but it should not be confused with its foam-like confectionery namesake. Dietary supplements derived from Althaea officinalis are sometimes called “marshmallow root” or “marshmallow leaf” and are often claimed to reduce inflammation, improve digestive health, and prevent coughs and colds.