Butterbur Extract with Standardized Rosmarinic Acid 60 softgels Item Catalog Number: 884 For nearly three decades, doctors in Germany have prescribed a standardized extract of the herb butterbur to their patients suffering from nasal discomfort and its related problems. Butterburs main active ingredient is petasin, a phytochemical that may reduce spasms in smooth muscle, thus relaxing swollen nasal membranes. This formula also contains standardized rosmarinic acid, a plant polyphenol derived from rosemary leaf. Rosmarinic acid suppresses inflammatory responder cells, thus providing effective, temporary relief while supporting healthy immune function.
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