Berberine

Berberine is a quaternary ammonium salt from the protoberberine group of isoquinoline alkaloids. It is found in such plants as Berberis, Hydrastis canadensis (goldenseal), Phellodendron amurense (Amur cork tree, huang bai, huang po, po mu) and Coptis chinensis (Chinese goldthread, huang-lian, huang-lien), and Tinospora cordifolia, and to a smaller extent in Argemone mexicana (prickly poppy) and Eschscholzia californica (Californian poppy). Berberine is usually found in the roots, rhizomes, stems, and bark.