The most abundant chemical components of slippery elm are mucilage and tannins.
Mucilage is a type of fiber that forms a gel-like substance when mixed with water.
Tannins are another well-known bioactive compound of slippery elm. Tannins are believed to benefit skin conditions, such as acne, due to their astringent properties.
Other chemical constituents of slippery elm include:
Calcium oxalate, Phytosterols, Flavonoids, Salicylic acid, Capric acid, Caprylic acid, Decanoic acid, Vitamin E.