A review is presented of the data on the safety of the squeezed sap of Echinacea purpurea used as an oral immunostimulant. All articles in which the presence or absence of adverse events of the extract of the flowering coneflower or its constituents was reported were considered, provided that the
Echinacea purpurea (L.) Moench, Echinacea angustifolia DC. var. angustifolia and Echinacea pallida (Nutt.) Nutt. are frequently used as medicinal plants and their preparations are among the most widely used herbal medicines. The extracts from these species have shown a highly complex chemical
BACKGROUND
Respiratory tract infections are common, and these infections occur frequently in children, susceptible adults, and older persons. The risk for recurrences and complications relates not only to the presence of viruses but also to immune function. Therefore, modulation of the immune system
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