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Echinacea purpurea
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The genus Echinacea belongs to the family Compositae, commonly referred to as the sunflower family. Of the known species, E. purpurea, E. angustifolia, and E. pallida are commonly used in herbal medicine. Extracts derived from the root and aerial parts are widely used in Europe and the United States as nonspecific immunostimulants and to prevent or treat the common cold and influenza. However, natural products differ greatly in composition (26), mainly due to the use of different species, variable plant materials or extraction methods, and the addition of other components. Preclinical studies suggest immunostimulatory and anti-inflammatory effects
