Does Goldenseal Really Work to Kill Giardia?
Goldenseal, also known as yellow root, with the Latin name of Hydrastis canadensis, grows wild in parts of the United States. It has been used in traditional Native American medicine to treat infections and ulcers. Little evidence exists to suggest it is useful as a medicine.
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Giardia
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Giardia is an infection of the gastrointestinal tract by a parasite called Giardia lamblia. It causes diarrhea and cramps, and can be treated using medicines containing drugs such as quinacrine and metronidazole.
Effectiveness of Goldenseal
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According to the National Center for Complementary and Alternative Medicine, goldenseal has not been proven to have any effects on any illnesses. A compound in the plant, berberine, does have an effect on some diarrhea-causing infections, but the amount of berberine in the plant is probably too low to be useful.
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Treatment
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Taking goldenseal at recommended doses could result in side effects such as nausea and vomiting, and the plant is not advised for pregnant or breastfeeding women. Always consult your doctor before taking any herbal medicines.
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