What Is Butterbur Extract Butterbur extract comes from an herbaceous perennial in the daisy family (Petasites hybridus), also known as bog rhubarb, devil's hat, or pestilence wort. Butterbur is native to northern Asia and Europe. This product is a butterbur root extract in powdered form. Butterbur Extract Benefits Butterbur extract has a wide range of great health benefits, including supporting the lungs, helping to promote healing, fortifying the brain and heart, and benefiting the digestive system and bladder.* Butterbur extract may also promote joint health.*