Marshmallow root contains mucilage — a water-soluble polysaccharide gel that coats and soothes irritated mucous membranes throughout the GI tract. Our research shows this is the classic demulcent herb: it physically forms a protective gel layer over inflamed tissue (throat, esophagus, stomach, intestines). A 2010 study confirmed marshmallow root extract reduced dry cough severity comparably to codeine-based cough syrups without sedation. The European Medicines Agency (EMA) granted it traditional herbal medicine status for both throat/cough irritation and gastric inflammation. The mucilage content (10-35% by weight) physically protects tissue — this is MECHANICAL action, not pharmacological.
Marshmallow mucilage is a mixture of polysaccharides (galacturonorhamnans, glucans, arabinogalactans) that: (1) form a viscous bioadhesive gel that coats mucous membranes — this PHYSICAL barrier protects tissue from acid, enzymes, and irritants (the mechanism is primarily MECHANICAL, not pharmacological); (2) stimulate epithelial cell proliferation — promoting mucosal repair; (3) activate macrophages — mild immune modulation; (4) inhibit mucociliary transport rate — reducing cough reflex by coating irritated sensory nerve endings in the pharynx. The cold-water extraction is essential because heat denatures the polysaccharide gel structure.
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.