Herbs of Gold Slippery Elm 400mg supports digestive system health and healthy mucous linings of the digestive system. Slippery Elm 400mg contains Slippery elm inner stem bark powder. Slippery elm naturally contains mucilage that develops into a gel-like consistency once it comes into contact with water. Mucilage coats the mucous membranes of the digestive system helping to soothe irritated tissues. Slippery elm is traditionally used in Western herbal medicine to soothe gastro-intestinal tract mucous membranes and as a nutritive tonic.