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The ability of Echinacea to stimulate the immune system is extremely well documented. The primary constituent responsible for its activity are large sugar molecules called polysaccharides. Two in particular have been identified as beneficial: inulin and arabinogalactin. These polysaccharides activate the immune system in many ways. Echinacea has been shown to increase production of T cells, increase levels of circulating neutrophils, improve leukocyte phagocytosis, assist antibody binding and natural killer cell activity. Echinacea also has direct antibacterial properties. In general, Echinacea has been thoroughly demonstrated to reduce the duration and severity of common cold and flu symptoms. Echinacea is a herb that deserves its place in our medicine cabinet.
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