Wild indigo is native to the Midwestern United States and continues to grow primarily in this region. The root of wild indigo is used medicinally. Wild indigo has been used in connection with the following conditions: common cold/sore throat, infection, and influenza.
Historically, wild indigo was most commonly used to make a blue dye used to color clothing. It has also been used by European herbalists to create remedies for ulcers and mouth, lymph node, and throat infections.
Today it is believed that the polysaccharides and proteins in wild indigo may be effective immune system stimulators. This would explain why wild indigo products have been used to fight the cold and flu. However, wild indigo is rarely used alone and is most commonly found as a component in herbal mixtures and remedies. The root of the wild indigo contains alkaloids, which also may contribute to its medicinal actions.Dosage and Administration
Wild indigo is generally used in combination with herbs such as Echinacea and thuja. A tincture, 1-2 ml three times per day, is sometimes used. When taking the whole herb, 500-1,000 mg is taken as a tea three times daily.