Evidence Level
Preliminary
Marshmallow root has a long history of traditional use validated by European pharmacopoeias and the EMA (European Medicines Agency), which grants it "traditional use" status for dry cough and mild gastric complaints. Modern research confirms its mucilage content, anti-inflammatory properties, and mucosal bioadhesion. Clinical trial evidence is limited to small studies and combination products. Its primary role remains as a gentle, well-tolerated demulcent for GI and respiratory mucosal irritation.