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Marshmallow is most commonly used to ease sore throats and dry coughs. The Marshmallow plant, especially the leaves and roots, contains polysaccharides that have antitussive, mucilaginous, and antibacterial properties.
The use of marshmallow to make sweets dates back to ancient Egypt, where the recipe called for extracting sap from the plant and mixing it with nuts and honey. Another pre-modern recipe uses the pith of the marshmallow plant, rather than the sap.The stem was peeled back to reveal the soft and spongy pith, which was boiled in sugar syrup and dried to produce a soft, chewy confection. The marshmallow plant's sap was also used by gladiators in ancient Rome.arshmallow probably came first into being as a medicinal substance, since the mucilaginous extracts come from the root of the marshmallow plant, Althaea officinalis, which were used as a remedy for sore throats.