Butterbur is an herb that is taken as a supplement to promote several areas of health. It is used to support brain health, respiratory health, blood vessel health and bladder health. The active ingredients in butterbur are petasins, which support healthy blood vessels and muscles. Swanson Superior Herbs Butterbur Extract is standardized to 15% petasins and is free of pyrrolizidine alkaloids.
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Ratings based on results of the 2017 ConsumerLab.com Survey of Supplement Users. More information at http://www.consumerlab.com/survey2017
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