Common marshmallow (Althaea officinalis) is a perennial plant in the Malvaceae family, a cousin of the mallow, native to Europe and Asia. Its root and leaves contain up to 30% mucilage, long chains of polysaccharides that form a creamy gel when they come into contact with water. This unique property explains its millennia-old use for soothing irritated mucous membranes in the ENT, digestive, urinary, and skin systems. It is recognized by the European Pharmacopoeia and the EMA.
Its emollient properties are based on a physical mechanism: the mucilages coat the mucous membranes with a protective film. It is traditionally used to:
Choose the dosage form based on the intended use:
The mechanical action of the mucilages coats the pharyngeal mucosa and calms the cough reflex by acting as a barrier. Marshmallow is one of the most well-documented plants used in throat-soothing syrups and is effective for dry, irritating coughs. Any cough lasting more than 7 days or accompanied by a fever warrants a doctor’s visit.
In the stomach, the mucilaginous gel coats the stomach lining and provides relief from heartburn and acid reflux. In the intestines, the mucilage gently increases the volume of stool and facilitates its passage, making it helpful for mild constipation and sensitive bowels. Adequate hydration is essential during treatment.
When used externally, its emollient properties soothe redness, reactive skin, and minor rashes. It is an ingredient in balms formulated for rashes and superficial wounds, to be used following proper cleansing. For extensive skin lesions or deep burns, medical advice is required.
Traditionally, chewing marshmallow root was used to ease teething. Today, its use in infants and young children should always be discussed with a pharmacist or pediatrician—especially before 12 months of age—to determine the appropriate form and dosage.
Herbal synergies depend on the intended use:
