Slippery Elm Bark (Ulmus rubra) is a medium-sized forest tree native to North America. The inner bark contains a starchy carbohydrate substance called mucilage. When it’s mixed with water it swells and forms a slippery gel. Mucilage is used as a soothing demulcent. Demulcents offers soothing support for mucous membranes* It is commonly used to soothe the throat* and support healthy digestion*