One of the main uses for marshmallow in herbal medicine is to help soothe scratchy, itchy sore throats. Marshmallow root, and to some extent marshmallow leaf, also can be used for gastrointestinal inflammations, stomach upsets and other GI tract conditions. Combined with other herbs that contain mucilage marshmallow helps people who rely on their voices -- radio announcers, TV personalities, singers, or anyone who needs to make sure their voice is working optimally