Mahonia (Berberis) aquifolium. Young Lateral Roots. Herbal Dietary Supplement. We prepare our Oregon Grape Extract from the young lateral roots of Mahonia (Berberis) aquifolium shrubs which are Custom Wildcrafted™ in their wild mountain habitat in the Pacific Northwest. To assure optimal extraction of Oregon Grape's bioactive compounds the roots are hand-dug only in late autumn or early spring and are then carefully shade-dried and thoroughly extracted. Our Oregon Grape is never fumigated or irradiated.
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