Excellent source of berberine (other berberine plants include goldenseal, Oregon grape, and barberry). Berberine has strong antimicrobial properties, but is not well absorbed through the intestines when taking orally. Therefore, its primary value is restoring balance in gut microflora. According to Stephen Buhner, berberine also has value in destroying Chlamydia in the cecum of the intestine, a place used as a reservoir by the microbe. Coptis is also valuable as an eyewash for conjunctivitis (Bartonella, Chlamydia).
Side effects: Generally well tolerated. Side effects are mainly gastrointestinal. Can lower blood pressure.