Echinacea is often described as providing immune support. In vitro lab data suggests that this is true, however positive clinical data is lacking. Below are some of the available studies.
Macrophage Activation by the Polysaccharide Arabinogalactan Isolated From Plant Cell Cultures of Echinacea purpurea.
Macrophage activation and induction of macrophage cytotoxicity by purified polysaccharide fractions from the plant Echinacea purpurea.
Antioxidant and Immuno-Enhancing Effects of Echinacea purpurea
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