Slippery Elm Bark, or Ulmus rubra, is an herb derived from the inner part of the elm bark and is usually used as a finely ground powder. Our Slippery Elm Bark is 100% inner bark. It is considered to be a safe and gentle herb and is allergen free. The inner bark, normally ground into a powder has been used for a variety of medicinal purposes. The powdered form is commonly made into a tea with sweetener and milk. It is not advised for pregnant women to consume this bark.