Brief Background: Echinacea species are perennials which belong to the aster family (Asteraceae) and which originate in eastern North America. Traditionally used for a range of infections and malignancies, the roots and herb (above ground parts) of Echinacea species have attracted scientific interest due to purported "immune stimulant" properties. Oral preparations of Echinacea species are popular the U.S. for prevention and treatment of upper respiratory tract infections (URI) or the "common cold." In the U.S., sales of Echinacea are believed to represent approximately 10% of the dietary supplement market. Expert Opinion and Historic/Folkloric Precedent: Natural medicine experts frequently recommend Echinacea species oral extracts for treatment of the common cold, and for other conditions requiring "immune stimulation." It is occasionally recommended for topical treatment of wounds. Echinacea ang. root         Back