Organic Oregon Grape Root by Mountain Rose Herbs

What the brand says

Oregon grape, indigenous to western North America, thrives in the Pacific Northwest. This bushy, flowering perennial boasts shiny, holly-like leaves and is commonly found in mountainous regions, adapting well to its environment. Its golden yellow root, often used medicinally, can substitute for goldenseal due to similar properties. Clinically, it supports certain skin irritations when applied externally. In vitro tests show its root's active constituents have substantial antimicrobial and antifungal activity, though human trials are inconclusive.