Review of Berbamax The Blood Sugar Control Supplement You Need! Learn More What Is Berberine?   Barberry (Berberis vulgaris), Oregon Grape (Mahonia aquifolium), Goldenseal (Hydrastis Canadensis), and Chinese goldthread all contain the chemical berberine (Coptis Chinensis). It has been used in traditional Chinese and Indian medicine for 3000 years. Because of the mechanism of berberine, you...