Swanson Butterbur Extract - Standardized 75 mg, 60 Caps | PA-Free

Butterbur Extract standardized to 75 mg per serving in a 60-cap bottle. PA-free and tested for potency, delivering 7 mg of petasin per serving. Formulated with science, crafted with care in Fargo, ND, with GMP-certified facilities and independent third-party testing to support quality and heritage.