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nightsurfer on 2009-12-01"Berberine is a plant alkaloid isolated from the roots and bark of several herbs. Some of these herbs include:
Barberry (Berberis vulgaris), Berberis integerrima. Berbamine and berberine are found in the plant barberry.
Coptis chinensis or Berberis aristata
Goldenseal (Hydrastis canadensis)
Oregon Grape (Berberis aquifolium)
Yerba mansa (Anemopsis californica).
The berberine alkaloid can be found in the roots, rhizomes, stem, and bark of the plants. Berberine-containing plants are used medicinally in many traditional medical systems, including Ayurvedic herbal and Chinese herbal medicine.
Coptis chinensis rhizome -- Golden Thread -- Huang Lian -- Intense yellow color most likely due to high content of berberine, which is very bitter in taste"