Slippery elm is a small species of elm tree that is native to eastern North America. The bark of the tree is harvested for its inner lining or pith, which contains a high mucilage content that gives rise to the “slippery” factor. Slippery elm bark is traditionally used to make soothing ointments, lotions, creams and other topical preparations for the skin. The herb is also used to make tinctures, teas, syrups and throat lozenges. Powdered slippery elm bark is typically used to make poultices and suppositories. Because slippery elm bark contains various nutrients, the powdered herb is also encapsulated as a dietary supplement or is combined with hot water, cinnamon and sugar to make a gruel, or hot cereal.