What is butterbur? Butterbur (Petasites hybridus) is a shrub-like plant with large, broad leaves and purplish-pink flowers, native to Europe and northern Asia. Its name comes from the supposed use of butterbur leaves to wrap and store butter before the time of refrigeration. Extracts of the plants roots, leaves and flowers have been used as far back as the Middle Ages for head discomfort, seasonal challenges and respiratory health support. How does butterbur support health? Contains natural, bioactive plant compounds called sesquiterpene esters, including the active ingredient, petasin. Why choose Vitacost Butterbur Extract? Supplies 75 mg of butterbur extract per single-capsule serving Standardized to ensure consistent amount of active ingredient in each dose Contains 120 servings per bottle Exceptional quality at an extraordinary value About Vitacost All Vitacost products are laboratory tested to meet FDA standards for identity, purity and composition. All products are tested for heavy metals, microbiology and contaminants. Vitacost products are produced in a NSF Certified facility. Freshness is guaranteed. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.