Just Natural Speciality Slippery Elm Inner Bark Powder 100gJust Natural Specialty Slippery Elm Bark Powder contains mucilage, which is thought to provide medicinal benefits, including relief from the effects of acid reflux. When mixed with water, the mucilage forms a gel which coats the gastrointestinal tract. Try mixing with water, juice or adding to tea. For nutritional information and ingredients, click Further Information.