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Ulmus rubra
In Plain English
Slippery elm comes from the inner bark of a North American tree. When mixed with water, it forms a slippery mucilage; herbalists call that demulcent, meaning a soothing, coating quality. Inner bark is the traditional material, rather than the tree's tougher outer bark.
Traditional Uses & Why Herbalists Value It
North American herbalists mix powdered slippery elm inner bark into water, soft gruels and lozenges. They choose it as a demulcent, a material whose mucilage forms a soothing, coating texture. The soft inner bark supplies this quality.
What Modern Research Has Found
Research describes the inner bark's water-swelling mucilage, the physical property behind its traditional demulcent use. Clinical studies of slippery elm alone are scarce, with some research involving multi-ingredient preparations.
Plant Part, Preparation & Natural Constituents
Ulmus rubra inner bark contains mucilage. Separate oral medicines from mucilage-rich preparations when relevant.
Slippery elm inner bark in Formulae
Colon Detox products pair slippery elm's mucilage-rich, coating inner bark with psyllium fiber, which swells and adds bulk when hydrated.
