Nutramedix Barberry is a herbal extract made from the root of Mahonia aquifolium, commonly known as Oregon Grape. Historically - the indigenous peoples of North America treated all manner of complaints with Barberry. Traditionally, a tea made from the root was used to treat arthritis, diarrhoea, fever, and to support immune function.Barberry contains many Alkaloids, including Berberine, Berbamine, Canadine, and Hydrastine. Recent scientific studies also indicate that the root also contains an important active named 5' Methoxyhydnocarpin (5'MHC) which works to decrease bacterial resistance to antibiotics and antibacterial agents.