When it comes to parasitic infections, the symptoms are wide and varied, but most consist of poor nutrient uptake and compromised digestive efficiency. Giardiasis is a very common parasitic infection of the duodenum that can fortunately be countered by a number of natural health remedies. Oregon Grape is one such treatment, and thanks to the powerful alkaloids and anti-parasitic compounds in the fruit, it can directly inhibit giardiasis from spreading, and help the body eliminate it from the digestive tracts.