Slippery elm bark is a natural substance that is derived from the inner bark of the slippery elm tree (Ulmus rubra), which is native to North America. The bark has a slippery, mucilaginous texture when mixed with water, which gives it its common name. It has been used traditionally by Native American and First Nations communities for centuries as a natural remedy for a variety of ailments.

Slippery elm bark is known for its soothing properties and is often used to help alleviate irritation and inflammation in the digestive tract. It may also have antioxidant and antimicrobial effects, although more research is needed to fully understand these potential benefits. It is important to note that slippery elm bark is not intended to diagnose, treat, cure, or prevent any disease and should not be used as a substitute for medical care.