Butterbur Extract from Swanson comes in a 60-capsule pack, with each capsule delivering 75 mg of Petasites hybridus root extract. The extract is standardised to provide 7 mg of total petasins per capsule — comprising petasin, isopetasin, and S-petasin — and is certified free of pyrrolizidine alkaloids (PAs), a key consideration for those seeking a PA-free butterbur supplement.
Butterbur is a well-established traditional herb with a long history of use across Europe. Swanson’s version uses a high-quality extract selected to match the composition and potency of premium branded alternatives, making it a straightforward choice for those who want a quality-assured product without paying a premium price.
Each capsule is easy to swallow and suits those who prefer a simple, single-capsule format. The 60-capsule pack is well suited to adults who already incorporate herbal extracts into their daily wellness routine and are looking for a reliable, clearly labelled butterbur option.






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